diff --git a/apps/effectcraft-cli/src/main.rs b/apps/effectcraft-cli/src/main.rs
index 56264e44..43e51404 100644
--- a/apps/effectcraft-cli/src/main.rs
+++ b/apps/effectcraft-cli/src/main.rs
@@ -503,6 +503,9 @@ fn run(cmd: &str, args: &Args, json_out: bool) -> Result<(), Failure> {
             };
             let mut b = backend(args, true)?;
             let r = b.exec(&id, params)?;
+            if let Some(e) = failed_render(&id, &r) {
+                return Err(Failure::Error(e));
+            }
             let saved = maybe_save(&mut b, args)?;
             emit(&with_saved(r, saved), json_out);
         }
@@ -525,6 +528,9 @@ fn run(cmd: &str, args: &Args, json_out: bool) -> Result<(), Failure> {
                 };
                 i += 1;
                 let r = b.exec(id, params).map_err(|e| Failure::Error(format!("{id}: {e}")))?;
+                if let Some(e) = failed_render(id, &r) {
+                    return Err(Failure::Error(format!("{id}: {e}")));
+                }
                 if !json_out {
                     emit(&r, false);
                 }
@@ -647,6 +653,21 @@ fn positional<const N: usize>(args: &Args, usage: &str) -> Result<[String; N], F
     Ok(std::array::from_fn(|i| args.pos[i].clone()))
 }
 
+/// `renderQueue.render` reports a failed item in its result, not as an error. Under `run`/`exec`
+/// that item fails the command (#1426), as it fails `render --queue`.
+fn failed_render(id: &str, r: &Value) -> Option<String> {
+    if id != "renderQueue.render" {
+        return None;
+    }
+    let failed: Vec<String> = r["items"]
+        .as_array()
+        .into_iter()
+        .flatten()
+        .filter_map(|i| Some(format!("{}: {}", i["compName"].as_str().unwrap_or("?"), i["status"].get("Failed")?.as_str().unwrap_or("failed"))))
+        .collect();
+    (!failed.is_empty()).then(|| failed.join("; "))
+}
+
 fn with_saved(v: Value, saved: Option<String>) -> Value {
     match saved {
         None => v,
@@ -670,11 +691,10 @@ fn render(args: &Args, json_out: bool) -> Result<(), Failure> {
     let mut s = session(args)?;
     if args.opt("--template").is_some() {
         template::prepare(&mut s, args)?;
-    } else {
-        match &args.project {
-            Some(p) => s.execute("file.open", json!({"path": p})).map_err(|e| Failure::Error(e.to_string()))?,
-            None => s.execute("file.openDemoProject", json!({})).map_err(|e| Failure::Error(e.to_string()))?,
-        };
+    } else if let Some(p) = &args.project {
+        s.execute("file.open", json!({"path": p})).map_err(|e| Failure::Error(e.to_string()))?;
+    } else if args.flag("--demo") || !args.flag("--empty") {
+        s.execute("file.openDemoProject", json!({})).map_err(|e| Failure::Error(e.to_string()))?;
     }
     let err = |e: effectcraft_engine::EngineError| Failure::Error(e.to_string());
     if !args.flag("--queue") {
diff --git a/apps/effectcraft-cli/src/template.rs b/apps/effectcraft-cli/src/template.rs
index f4da23cd..f84303dd 100644
--- a/apps/effectcraft-cli/src/template.rs
+++ b/apps/effectcraft-cli/src/template.rs
@@ -36,7 +36,20 @@ pub(super) fn validate(cmd: &str, args: &Args) -> Result<(), Failure> {
     {
         for input in ["--template", "--values"] {
             if let Some(path) = args.opt(input)
-                && std::fs::canonicalize(path).is_ok_and(|path| path == output)
+                && std::fs::canonicalize(path).is_ok_and(|path| {
+                    if path == output {
+                        return true;
+                    }
+                    #[cfg(unix)]
+                    {
+                        use std::os::unix::fs::MetadataExt;
+                        // Distinct canonical paths can still name the same file through hard links.
+                        if let (Ok(input), Ok(output)) = (std::fs::metadata(&path), std::fs::metadata(&output)) {
+                            return input.dev() == output.dev() && input.ino() == output.ino();
+                        }
+                    }
+                    false
+                })
             {
                 return Err(Failure::Error(format!("--out {out} would overwrite {input} {path}")));
             }
diff --git a/apps/effectcraft-cli/tests/cli.rs b/apps/effectcraft-cli/tests/cli.rs
index 7b20bcdc..30a0271b 100644
--- a/apps/effectcraft-cli/tests/cli.rs
+++ b/apps/effectcraft-cli/tests/cli.rs
@@ -484,6 +484,32 @@ fn mcp_autosave_is_opt_in_and_rejects_invalid_combinations() {
     std::fs::remove_dir_all(config).unwrap();
 }
 
+/// `run`/`exec renderQueue.render` (#1426): a failed item is a command error, exit 1 like
+/// `render --queue`, not a success with the failure buried in the JSON.
+#[test]
+fn a_failed_render_under_run_and_exec_exits_1() {
+    let root = tmp("render-fails");
+    let _ = std::fs::remove_dir_all(&root);
+    std::fs::create_dir_all(&root).unwrap();
+    // The output's folder is a file, so the encoder cannot open the output.
+    let blocker = root.join("not-a-folder");
+    std::fs::write(&blocker, "x").unwrap();
+    let out = blocker.join("out.gif");
+    let add = json!({"comp": "T", "format": "gif", "output": out.to_str().unwrap()}).to_string();
+    let project = root.join("q.ecproj");
+    let steps = ["comp.new", r#"{"name":"T","width":16,"height":16,"duration":0.1}"#, "layer.newSolid", "{}", "renderQueue.add", &add];
+    ok_json(&[&["run", "--empty", "--save-as", project.to_str().unwrap()][..], &steps[..]].concat());
+
+    let (code, v) = run_json(&[&["run", "--empty"][..], &steps[..], &["renderQueue.render", r#"{"wait":true}"#][..]].concat());
+    assert_eq!(code, 1, "{v}");
+    let e = v["error"].as_str().unwrap_or_else(|| panic!("{v}"));
+    assert!(e.starts_with("renderQueue.render: T: "), "{e}");
+
+    let (code, v) = run_json(&["exec", "renderQueue.render", "--project", project.to_str().unwrap()]);
+    assert_eq!(code, 1, "{v}");
+    assert!(v["error"].as_str().is_some_and(|e| e.starts_with("T: ")), "{v}");
+}
+
 /// `render --bitrate` (#440) targets the bitrate in VP9 WebM.
 #[test]
 fn render_bitrate_applies_to_vp9_webm() {
@@ -513,3 +539,57 @@ fn render_bitrate_applies_to_vp9_webm() {
     assert!(high > low, "100 kbps: {low} bytes, 8000 kbps: {high} bytes");
     let _ = std::fs::remove_dir_all(&root);
 }
+
+/// Render uses the same empty/project/demo selection as the other CLI commands.
+#[test]
+fn render_empty_does_not_load_the_demo() {
+    let root = tmp("render-empty");
+    let _ = std::fs::remove_dir_all(&root);
+    std::fs::create_dir_all(&root).unwrap();
+    let project = root.join("control.ecproj");
+    let template = root.join("control.ectemplate");
+    let project_path = project.to_str().unwrap();
+    let template_path = template.to_str().unwrap();
+    let build = r#"
+var comp = app.project.items.addComp("Empty control", 64, 36, 1, 1, 30);
+var solid = comp.layers.addSolid([0, 1, 0], "Green", 64, 36, 1);
+solid.property("ADBE Transform Group").property("ADBE Opacity").addToMotionGraphicsTemplateAs(comp, "Opacity");
+"#;
+    ok_json(&["script", "--eval", build, "--save-as", project_path]);
+    let params = json!({"comp": "Empty control", "path": template_path}).to_string();
+    let exported = ok_json(&["exec", "essential.exportTemplate", &params, "--project", project_path]);
+    assert_eq!(exported["controls"], 1, "{exported}");
+    let empty = ok_json(&["info", "--empty"]);
+    assert!(empty["project"]["items"].as_array().unwrap().is_empty(), "{empty}");
+
+    let render = |options: &[&str], name: &str| {
+        let output = root.join(name);
+        assert!(!output.exists());
+        let mut args = vec!["render", "--format", "gif", "--start", "0", "--end", "0.1", "--resolution", "quarter", "--out", output.to_str().unwrap()];
+        args.extend_from_slice(options);
+        let reply = ok_json(&args);
+        assert_eq!(reply["rendered"].as_array().unwrap().len(), 1, "{reply}");
+        assert_eq!(PathBuf::from(reply["rendered"][0]["output"].as_str().unwrap()), output);
+        let bytes = std::fs::read(&output).unwrap();
+        assert!(bytes.len() >= 10 && (bytes.starts_with(b"GIF87a") || bytes.starts_with(b"GIF89a")), "{reply}");
+        let dimensions = (u16::from_le_bytes([bytes[6], bytes[7]]), u16::from_le_bytes([bytes[8], bytes[9]]));
+        (reply["rendered"][0]["comp"].clone(), dimensions)
+    };
+    // Defaults still render the demo, and an explicit demo wins over --empty.
+    let demo = render(&[], "default.gif");
+    assert_eq!(render(&["--demo", "--empty"], "demo.gif"), demo);
+    // A supplied project wins over both flags, while template mode also accepts --empty.
+    let project_result = render(&["--project", project_path, "--demo", "--empty"], "project.gif");
+    assert_eq!(project_result, (json!("Empty control"), (16, 9)));
+    assert_eq!(render(&["--template", template_path, "--empty"], "template.gif").1, (16, 9));
+
+    let output = root.join("empty.gif");
+    assert!(!output.exists());
+    let (code, reply) =
+        run_json(&["render", "--empty", "--format", "gif", "--start", "0", "--end", "0.1", "--resolution", "quarter", "--out", output.to_str().unwrap()]);
+    let output_exists = output.exists();
+    assert!(!output_exists, "--empty must not render the demo into the requested output");
+    assert_eq!(code, 1, "{reply}");
+    assert_eq!(reply["error"], "command `renderQueue.add` is not available right now: select or open a composition", "{reply}");
+    let _ = std::fs::remove_dir_all(&root);
+}
diff --git a/apps/effectcraft-cli/tests/qa_template.rs b/apps/effectcraft-cli/tests/qa_template.rs
index ac67280e..2765b163 100644
--- a/apps/effectcraft-cli/tests/qa_template.rs
+++ b/apps/effectcraft-cli/tests/qa_template.rs
@@ -247,7 +247,7 @@ fn template_output_alias_fixture(case: &str) -> PathBuf {
     dir
 }
 
-fn assert_template_output_preserves_inputs(dir: &PathBuf, out: &str) {
+fn assert_template_output_preserves_inputs(dir: &PathBuf, out: &str) -> Value {
     let template_before = std::fs::read(dir.join("lt.ectemplate")).unwrap();
     let values_before = std::fs::read(dir.join("values.json")).unwrap();
     // Read the inputs before interpreting the subprocess status or error text.
@@ -272,7 +272,8 @@ fn assert_template_output_preserves_inputs(dir: &PathBuf, out: &str) {
     );
     assert!(template_preserved, "template rendering must preserve its template input when --out aliases that file");
     assert!(values_preserved, "template rendering must preserve its values input when --out aliases that file");
-    assert!(!result.status.success(), "an output alias must fail before rendering overwrites an input");
+    assert_eq!(result.status.code(), Some(1), "an output alias must fail before rendering overwrites an input");
+    serde_json::from_slice(&result.stdout).unwrap()
 }
 
 #[test]
@@ -652,3 +653,39 @@ fn template_missing_output_does_not_replace_extracted_media() {
     assert!(media_preserved, "missing --out must fail before overwriting previously extracted media");
     let _ = std::fs::remove_dir_all(&dir);
 }
+
+#[cfg(unix)]
+#[test]
+fn template_frame_output_cannot_alias_its_template_through_a_hard_link() {
+    use std::os::unix::fs::MetadataExt;
+
+    let dir = template_output_alias_fixture("hard-linked-template");
+    let input = dir.join("lt.ectemplate");
+    let output = dir.join("hard-linked-template.png");
+    std::fs::hard_link(&input, &output).unwrap();
+    let input_metadata = std::fs::metadata(&input).unwrap();
+    let output_metadata = std::fs::metadata(&output).unwrap();
+    assert_eq!((input_metadata.dev(), input_metadata.ino()), (output_metadata.dev(), output_metadata.ino()), "actual hard-link file identity");
+    assert_ne!(input.canonicalize().unwrap(), output.canonicalize().unwrap(), "the hard link has a distinct canonical path");
+    let reply = assert_template_output_preserves_inputs(&dir, "hard-linked-template.png");
+    assert_eq!(reply["error"], "--out hard-linked-template.png would overwrite --template lt.ectemplate", "{reply}");
+    let _ = std::fs::remove_dir_all(&dir);
+}
+
+#[cfg(unix)]
+#[test]
+fn template_frame_output_cannot_alias_its_values_through_a_hard_link() {
+    use std::os::unix::fs::MetadataExt;
+
+    let dir = template_output_alias_fixture("hard-linked-values");
+    let input = dir.join("values.json");
+    let output = dir.join("hard-linked-values.png");
+    std::fs::hard_link(&input, &output).unwrap();
+    let input_metadata = std::fs::metadata(&input).unwrap();
+    let output_metadata = std::fs::metadata(&output).unwrap();
+    assert_eq!((input_metadata.dev(), input_metadata.ino()), (output_metadata.dev(), output_metadata.ino()), "actual hard-link file identity");
+    assert_ne!(input.canonicalize().unwrap(), output.canonicalize().unwrap(), "the hard link has a distinct canonical path");
+    let reply = assert_template_output_preserves_inputs(&dir, "hard-linked-values.png");
+    assert_eq!(reply["error"], "--out hard-linked-values.png would overwrite --values values.json", "{reply}");
+    let _ = std::fs::remove_dir_all(&dir);
+}
diff --git a/apps/effectcraft-web/src/files.rs b/apps/effectcraft-web/src/files.rs
index 76b79912..3f3f3a99 100644
--- a/apps/effectcraft-web/src/files.rs
+++ b/apps/effectcraft-web/src/files.rs
@@ -144,6 +144,10 @@ impl Services for WebServices {
         let dir = dir.trim_end_matches('/');
         list().into_iter().map(|(p, _)| p).filter(|p| p.rsplit_once('/').is_some_and(|(d, _)| d == dir)).collect()
     }
+    /// The table's files (the default asks `std::fs`, which has no files on wasm32).
+    fn exists(&self, path: &str) -> bool {
+        get(path).is_some()
+    }
     fn is_dir(&self, _path: &str) -> bool {
         false
     }
diff --git a/apps/effectcraft-web/tests/smoke.mjs b/apps/effectcraft-web/tests/smoke.mjs
index ee272a67..3a6c1337 100644
--- a/apps/effectcraft-web/tests/smoke.mjs
+++ b/apps/effectcraft-web/tests/smoke.mjs
@@ -441,6 +441,18 @@ try {
   const comps = await js(`effectcraft.inspect().then(i => i.activeComp)`);
   if (!comps) throw new Error("reopened project has no active comp");
   report.steps.reopen = { ...opened, activeComp: comps };
+
+  // Files the page holds (browser storage, no std::fs): a script opens one next to the project,
+  // and the footage check finds the imported media instead of marking it missing.
+  const hf = await js(`(async () => {
+    const p = await effectcraft.addFile(new File(["from the page"], "script-data.txt"));
+    await effectcraft.saveToBrowser("/host-files.ecproj");
+    const run = await effectcraft.execute("script.run", {code: "var f = new File(" + JSON.stringify(p) + "); writeLn(f.open('r') ? f.read() : f.error);"});
+    return {output: run.output, footage: await effectcraft.execute("footage.check", {wait: true})};
+  })()`);
+  report.steps.hostFiles = hf;
+  check(hf.output === "from the page", `a script opens a file the page holds (${hf.output})`);
+  check(hf.footage.checked > 0 && hf.footage.missing === 0, `stored footage isn't missing (${JSON.stringify(hf.footage)})`);
   report.steps.final = { screenshot: await shot("02-after") };
 
   // Persistence: the session, imported media, settings and a project saved to browser storage
diff --git a/crates/effects/src/catalog.rs b/crates/effects/src/catalog.rs
index 82678eb8..0be2b04f 100644
--- a/crates/effects/src/catalog.rs
+++ b/crates/effects/src/catalog.rs
@@ -98,6 +98,9 @@ pub fn gpu_supported(id: &str, ctx: &crate::EffectCtx) -> bool {
     match id {
         "ec.generate.cellpattern" if (6..=10).contains(&ctx.params.e("cellPattern")) => return false,
         "ec.distort.turbulentdisplace" if ctx.params.e("pinning") >= 8 => return false,
+        // #1195: CC Particle World's motion trails (the averaged shutter samples) render on the
+        // CPU kernel until the GPU particle pass supports them.
+        "ec.sim.ccparticleworld" if ctx.env.shutter.filter(|(a, _, _)| *a > 0.0).is_some() => return false,
         _ => {}
     }
     let Some((_, controls)) = CPU_ONLY_CONTROLS.iter().find(|(e, _)| *e == id) else { return true };
@@ -199,6 +202,14 @@ mod tests {
         assert!(ok("ec.color.lumetri", &[]));
         assert!(!ok("ec.color.lumetri", &[("hslSecondary/correction/saturation", Value::Scalar(50.0))]));
         assert!(!ok("ec.noise.addgrain", &[("preset", Value::Enum(2))]));
+        // #1195: CC Particle World's motion trails (shutter samples) render on the CPU.
+        {
+            let params = ctx_with("ec.sim.ccparticleworld", &[]);
+            let env = crate::EffectEnv { frame_rate: 30.0, shutter: Some((180.0, -90.0, 16)), ..Default::default() };
+            let ctx = crate::EffectCtx { params: &params, time: 0.0, layer_size: [64.0, 64.0], seed: 0, adjustment: false, env };
+            assert!(!super::gpu_supported("ec.sim.ccparticleworld", &ctx));
+        }
+        assert!(ok("ec.sim.ccparticleworld", &[]));
         assert!(ok("ec.generate.cellpattern", &[("cellPattern", Value::Enum(3))]));
         assert!(!ok("ec.generate.cellpattern", &[("cellPattern", Value::Enum(9))]));
         assert!(!ok("ec.distort.turbulentdisplace", &[("pinning", Value::Enum(9))]));
diff --git a/crates/effects/src/color_fx.rs b/crates/effects/src/color_fx.rs
index e431ff22..cf6698fe 100644
--- a/crates/effects/src/color_fx.rs
+++ b/crates/effects/src/color_fx.rs
@@ -326,20 +326,27 @@ pub fn mirror_pow(v: f32, p: f32) -> f32 {
     v.abs().powf(p).copysign(v)
 }
 
+/// Black & White: a pixel's gray is its smallest channel plus its chroma (largest − smallest
+/// channel) times the colour sliders' weight for its hue. A neutral pixel keeps its value, a pure
+/// hue becomes its slider's percentage (Reds 40 % turns pure red into 40 % gray), and the gray
+/// never moves further from the smallest channel than the pixel's own chroma times the weight.
+/// It used to offset the luminance by the HSL saturation, which is near 1 for any tinted
+/// near-black pixel: the faint colour noise of compressed footage's shadows came out as bright
+/// and black blocks (#1463), and 32-bpc overbrights divided by zero.
 fn black_white(ctx: &EffectCtx, mut b: Buf) -> Buf {
     let w = [ctx.params.f("reds"), ctx.params.f("yellows"), ctx.params.f("greens"), ctx.params.f("cyans"), ctx.params.f("blues"), ctx.params.f("magentas")]
         .map(|v| v as f32 / 100.0);
     let tint_on = ctx.params.b("tint");
     let tc = ctx.params.color("tintColor");
     b.img.map_straight(|c| {
-        let (h, s, _) = rgb_to_hsl(c[0], c[1], c[2]);
+        let (h, _, _) = rgb_to_hsl(c[0], c[1], c[2]);
         // Interpolate the six hue weights around the colour wheel.
         let hp = h * 6.0;
         let i = hp.floor() as usize % 6;
         let f = hp - hp.floor();
         let wt = w[i] + (w[(i + 1) % 6] - w[i]) * f;
-        let base = luminance(c[0], c[1], c[2]);
-        let gray = (base + (wt - 0.5) * s * 0.6).max(0.0);
+        let (max, min) = (c[0].max(c[1]).max(c[2]), c[0].min(c[1]).min(c[2]));
+        let gray = (min + (max - min) * wt).max(0.0);
         if tint_on {
             let (th, ts, _) = rgb_to_hsl(tc[0], tc[1], tc[2]);
             let (r, g, bl) = hsl_to_rgb(th, ts, gray.min(1.0));
@@ -1220,6 +1227,66 @@ mod tests {
         assert!(go(0.0, 100.0, 64) >= 30);
     }
 
+    /// #1463: Black & White's sliders set the gray of each pure hue and blend between
+    /// neighbouring hues; neutral pixels keep their value, overbright ones too, and an overbright
+    /// colour stays finite (it used to divide by zero).
+    #[test]
+    fn black_white_sliders_set_the_gray_of_each_hue() {
+        let bw = |vals: &[(&str, Value)], c: [f32; 3]| px("ec.color.blackwhite", vals, [c[0], c[1], c[2], 1.0]);
+        let gray = |v: f32| [v, v, v, 1.0];
+        // The defaults: Reds 40, Yellows 60, Greens 40, Cyans 60, Blues 20, Magentas 80 (%).
+        let hues = [
+            ([1.0, 0.0, 0.0], 0.4),
+            ([1.0, 1.0, 0.0], 0.6),
+            ([0.0, 1.0, 0.0], 0.4),
+            ([0.0, 1.0, 1.0], 0.6),
+            ([0.0, 0.0, 1.0], 0.2),
+            ([1.0, 0.0, 1.0], 0.8),
+            // Half as bright, half the gray; orange is halfway from Reds to Yellows.
+            ([0.5, 0.0, 0.0], 0.2),
+            ([1.0, 0.5, 0.0], 0.5),
+            // Neutral pixels keep their value.
+            ([0.3, 0.3, 0.3], 0.3),
+            ([4.0, 4.0, 4.0], 4.0),
+            // An overbright red: its smallest channel plus its chroma at Reds' 40 %.
+            ([1.5, 0.5, 0.5], 0.9),
+        ];
+        for (c, want) in hues {
+            let o = bw(&[], c);
+            assert!(close(o, gray(want), 1e-5), "{c:?}: {o:?}, want {want}");
+        }
+        assert!(close(bw(&[("reds", num(120.0))], [1.0, 0.0, 0.0]), gray(1.2), 1e-5));
+        assert!(close(bw(&[("reds", num(-200.0))], [1.0, 0.0, 0.0]), gray(0.0), 1e-5));
+        assert!(close(bw(&[("blues", num(300.0))], [0.1, 0.1, 0.3]), gray(0.7), 1e-5));
+    }
+
+    /// #1463: faint colour noise stays faint. The shadows of compressed footage carry a code or
+    /// two of colour noise, which Black & White turned into bright and black blocks (the HSL
+    /// saturation it scaled is near 1 for any tinted near-black pixel). At 8, 16 and 32 bpc the
+    /// gray of a dark ramp with ±2 steps of colour noise stays within 2 steps of the clean ramp's.
+    #[test]
+    fn black_white_keeps_faint_colour_noise_faint() {
+        // A step of 8 bpc, of 16 bpc (After Effects' 0..32768), and a small 32-bpc float one.
+        for step in [1.0 / 255.0, 1.0 / 32768.0, 1e-3_f32] {
+            let (w, h) = (64u32, 4u32);
+            let (mut clean, mut noisy) = (Image::new(w, h), Image::new(w, h));
+            for y in 0..h {
+                for x in 0..w {
+                    // A dark ramp up to a quarter gray, in whole steps...
+                    let v = (x as f32 / w as f32 * 0.25 / step).round() * step;
+                    // ...and up to ±2 steps of noise per channel, mixed differently in each pixel.
+                    let n = |k: u32| (((x * 7 + y * 13 + k * 2) % 5) as f32 - 2.0) * step;
+                    clean.set(x, y, [v, v, v, 1.0]);
+                    noisy.set(x, y, [(v + n(0)).max(0.0), (v + n(1)).max(0.0), (v + n(2)).max(0.0), 1.0]);
+                }
+            }
+            let bw = |img| run_fx("ec.color.blackwhite", &[], img, 0.0, EffectEnv::default()).img;
+            let (a, b) = (bw(clean), bw(noisy));
+            let worst = a.data.iter().zip(&b.data).map(|(p, q)| (p[0] - q[0]).abs()).fold(0.0, f32::max);
+            assert!(worst <= 2.0 * step + 1e-6, "step {step}: the noise moved the gray by {} steps", worst / step);
+        }
+    }
+
     #[test]
     fn levels_clips_black_and_white_independently() {
         let lv = |vals: &[(&str, Value)], v: f32| px("ec.color.levels", vals, [v, v, v, 1.0])[0];
diff --git a/crates/effects/src/sim.rs b/crates/effects/src/sim.rs
index 2c7b97d1..14146a9f 100644
--- a/crates/effects/src/sim.rs
+++ b/crates/effects/src/sim.rs
@@ -238,9 +238,22 @@ impl SpritePlan {
     }
 
     /// Rasterise (after [`SpritePlan::resolve`]) and meet the original layer `b`.
-    pub fn finish(&self, mut b: Buf) -> Buf {
+    pub fn finish(&self, b: Buf) -> Buf {
         let fx = splat(b.img.width, b.img.height, &self.sprites, self.acc);
-        b.img = match self.post {
+        self.finish_with(b, fx)
+    }
+
+    /// [`finish`](Self::finish) with a prepared sprite image (the motion-blurred average of
+    /// several frames, #1195).
+    pub fn finish_with(&self, b: Buf, fx: Image) -> Buf {
+        self.post.apply(b, fx)
+    }
+}
+
+impl Post {
+    /// Meet the sprite image `fx` with the original layer `b` (see [`SpritePlan::finish`]).
+    fn apply(self, mut b: Buf, fx: Image) -> Buf {
+        b.img = match self {
             Post::Combine(m) => combine(&b.img, &fx, m),
             Post::Replace => fx,
             Post::Lerp(t) => {
@@ -1069,6 +1082,29 @@ fn pw_phys(ctx: &EffectCtx) -> Phys {
 }
 
 fn particle_world(ctx: &EffectCtx, b: Buf) -> Buf {
+    // #1195: with the comp's motion-blur shutter open, particles draw as motion trails: the
+    // sprite fields of samples across the shutter are averaged, as Transform averages its
+    // matrix samples. (The GPU compositor runs this case on the CPU: catalog::gpu_supported.)
+    if let Some((angle, phase, n)) = ctx.env.shutter.filter(|(a, _, _)| *a > 0.0) {
+        let n = (n.clamp(2, 64) as usize).max(2);
+        let fd = 1.0 / ctx.fps().max(0.001);
+        let mut acc = Image::new(b.img.width, b.img.height);
+        let mut post: Option<Post> = None;
+        for k in 0..n {
+            let t = ctx.time + (phase + angle * k as f64 / (n - 1) as f64) / 360.0 * fd;
+            let sub = EffectCtx { params: ctx.params, time: t, layer_size: ctx.layer_size, seed: ctx.seed, adjustment: ctx.adjustment, env: ctx.env };
+            if let Some(plan) = particle_world_plan(&sub, &b) {
+                let fx = splat(b.img.width, b.img.height, &plan.sprites, plan.acc);
+                acc.data.iter_mut().zip(&fx.data).for_each(|(a, o)| (0..4).for_each(|c| a[c] += o[c]));
+                post.get_or_insert(plan.post);
+            }
+        }
+        acc.data.iter_mut().for_each(|p| p.iter_mut().for_each(|v| *v /= n as f32));
+        return match post {
+            Some(p) => p.apply(b, acc),
+            None => b,
+        };
+    }
     match particle_world_plan(ctx, &b) {
         Some(plan) => plan.finish(b),
         None => b,
@@ -1715,6 +1751,31 @@ mod tests {
         ]
     }
 
+    /// #1195: with the comp's shutter open, the particles smear across it: the average of the
+    /// sampled sprite fields differs from the sharp frame, touches more pixels and keeps the
+    /// alpha energy.
+    #[test]
+    fn particle_world_motion_blur_trails() {
+        let v = pw_vals(21.0);
+        let blank = Image::new(40, 40);
+        let sharp = run("ec.sim.ccparticleworld", &v, blank.clone(), 2.0);
+        let blurred = crate::run_fx(
+            "ec.sim.ccparticleworld",
+            &v,
+            blank.clone(),
+            2.0,
+            EffectEnv { frame_rate: 10.0, shutter: Some((360.0, -180.0, 8)), ..Default::default() },
+        )
+        .img;
+        assert!(sharp.data.iter().any(|p| p[3] > 0.0), "sharp frame has particles");
+        assert_ne!(sharp.data, blurred.data, "the shutter smears the particles");
+        let lit = |img: &Image| img.data.iter().filter(|p| p[3] > 0.005).count();
+        let sum = |img: &Image| img.data.iter().map(|p| p[3]).sum::<f32>();
+        assert!(lit(&blurred) > lit(&sharp), "trails light more pixels: {} vs {}", lit(&blurred), lit(&sharp));
+        let (sa, ba) = (sum(&sharp), sum(&blurred));
+        assert!((ba - sa).abs() < sa * 0.6 + 1.0, "alpha energy roughly kept: {ba} vs {sa}");
+    }
+
     #[test]
     fn particle_world_seek_consistent() {
         let v = pw_vals(11.0);
diff --git a/crates/engine/src/commands/app_more.rs b/crates/engine/src/commands/app_more.rs
index 020880e8..1bb94952 100644
--- a/crates/engine/src/commands/app_more.rs
+++ b/crates/engine/src/commands/app_more.rs
@@ -245,7 +245,8 @@ fn has_footage(s: &Session) -> std::result::Result<(), String> {
 
 /// `File.execute()` from scripts (and agents): open a file with its default application.
 /// Needs Allow Scripts to Write Files and Access Network; with Warn User When Executing Files on,
-/// the frontend asks first (`confirmed: true` skips the question).
+/// the frontend asks first. `confirmed: true` is the frontend's answer to that question: a
+/// script can't give it for itself (#1246), so a script's request always asks.
 fn execute_file(s: &mut Session, p: &Value) -> Result<Value> {
     let path = str_p(p, "path").ok_or_else(|| bad("file.executeFile", "missing `path`"))?;
     if !s.prefs.scripting.allow_scripts_write_files {
@@ -257,7 +258,8 @@ fn execute_file(s: &mut Session, p: &Value) -> Result<Value> {
     if !std::path::Path::new(path).exists() {
         return Err(bad("file.executeFile", format!("no file {path}")));
     }
-    if s.prefs.scripting.warn_executing_files && !b_p(p, "confirmed").unwrap_or(false) {
+    let confirmed = b_p(p, "confirmed").unwrap_or(false) && !s.running_for_script();
+    if s.prefs.scripting.warn_executing_files && !confirmed {
         s.events.push(Event::Frontend { command: "app.confirmExecute".into(), params: json!({"path": path}) });
         return Ok(json!({"needsConfirmation": path}));
     }
diff --git a/crates/engine/src/commands/layer.rs b/crates/engine/src/commands/layer.rs
index ca8aa865..b798493b 100644
--- a/crates/engine/src/commands/layer.rs
+++ b/crates/engine/src/commands/layer.rs
@@ -417,6 +417,8 @@ fn set_switch_others(s: &mut Session, cid: ItemId, ids: &[LayerId], name: &str,
         let applies = |l: &Layer| match name {
             "audio" => l.props.sub("audio").is_some(),
             "lock" | "locked" => true,
+            // Nulls have a Video switch too (it hides their outline in the viewer).
+            "video" | "eye" => (l.source.is_av() || matches!(l.source, LayerSource::Null)) && !mattes.contains(&l.id),
             _ => l.source.is_av() && !mattes.contains(&l.id),
         };
         let mut alone = true;
diff --git a/crates/engine/src/commands/layer_menu.rs b/crates/engine/src/commands/layer_menu.rs
index 7737b8af..83a1510a 100644
--- a/crates/engine/src/commands/layer_menu.rs
+++ b/crates/engine/src/commands/layer_menu.rs
@@ -115,7 +115,7 @@ fn hide_other_video(s: &mut Session, p: &Value) -> Result<Value> {
     let (cid, ids) = layers_p(s, p)?;
     s.edit("Hide Other Video", None, |proj, _| {
         for l in proj.comp_mut(cid).ok_or(EngineError::NoComp)?.layers.iter_mut() {
-            if !ids.contains(&l.id) && l.source.is_av() {
+            if !ids.contains(&l.id) && (l.source.is_av() || matches!(l.source, LayerSource::Null)) {
                 l.switches.video = false;
             }
         }
diff --git a/crates/engine/src/commands/mask.rs b/crates/engine/src/commands/mask.rs
index 359de14d..778dfb54 100644
--- a/crates/engine/src/commands/mask.rs
+++ b/crates/engine/src/commands/mask.rs
@@ -132,6 +132,9 @@ fn edit_path_counted<T>(s: &mut Session, p: &Value, label: &str, f: impl FnOnce(
         let roto = super::paths::is_roto(g);
         let pr = g.get_mut("path").ok_or_else(|| bad(label, "mask has no path"))?;
         let KV::Path(mut sp) = pr.value_at(lt) else { return Err(bad(label, "not a path")) };
+        // A path read from a file may have fewer tangents than vertices; the edits below index
+        // all three arrays by vertex (#1250).
+        sp.fit_tangents();
         let (r, op) = f(&mut sp)?;
         if roto {
             super::paths::roto_smooth(&mut sp);
@@ -287,6 +290,7 @@ fn edit_vertices_counted(s: &mut Session, p: &Value, label: &str, removes: bool,
             let roto = super::paths::is_roto(g);
             let Some(pr) = g.get_mut("path") else { continue };
             let KV::Path(mut sp) = pr.value_at(lt) else { continue };
+            sp.fit_tangents();
             f(&mut sp, idx);
             if roto {
                 super::paths::roto_smooth(&mut sp);
diff --git a/crates/engine/src/footage_check.rs b/crates/engine/src/footage_check.rs
index 9524a208..adfb1768 100644
--- a/crates/engine/src/footage_check.rs
+++ b/crates/engine/src/footage_check.rs
@@ -235,7 +235,8 @@ mod tests {
         paths.sort();
         // Windows joins the stored "media/..." onto the project's folder and leaves a path with mixed
         // separators; `Path` equality compares components, so both spellings are the same file.
-        let expected = ["/nonexistent/ec/abs.png", clip.to_str().unwrap(), "media/ec-relative-gone.png"];
+        let mut expected = ["/nonexistent/ec/abs.png", clip.to_str().unwrap(), "media/ec-relative-gone.png"];
+        expected.sort();
         assert_eq!(paths.len(), expected.len(), "{paths:?}");
         for (got, want) in paths.iter().zip(expected) {
             assert_eq!(std::path::Path::new(got), std::path::Path::new(want), "{paths:?}");
diff --git a/crates/engine/src/tests_m145.rs b/crates/engine/src/tests_m145.rs
index 93125af1..fe0a1693 100644
--- a/crates/engine/src/tests_m145.rs
+++ b/crates/engine/src/tests_m145.rs
@@ -371,6 +371,34 @@ fn execute_file_needs_the_gate_and_asks_first() {
     assert!(s.execute("file.executeFile", p).unwrap().get("opened").is_some());
 }
 
+#[test]
+fn a_script_cannot_confirm_executing_a_file_for_itself() {
+    // Warn User When Executing Files: only the user answers the question (#1246).
+    let mut s = session();
+    let f = tmp("script-run.txt");
+    std::fs::write(&f, "x").unwrap();
+    let path = f.to_string_lossy().to_string();
+    let opened = |s: &mut Session| s.drain_events().iter().any(|e| matches!(e, crate::Event::OpenUrl(_)));
+    // Without the gate a script can't run files at all, confirmed or not.
+    assert!(s.execute_for_script("file.executeFile", json!({"path": path, "confirmed": true})).is_err());
+    s.execute("prefs.set", json!({"key": "scripting.allowScriptsWriteFiles", "value": true})).unwrap();
+    s.drain_events();
+    // A script asserting `confirmed` still gets the question, directly or in a batch.
+    let r = s.execute_for_script("file.executeFile", json!({"path": path, "confirmed": true})).unwrap();
+    assert!(r.get("needsConfirmation").is_some(), "{r}");
+    assert!(!opened(&mut s));
+    let steps = json!({"steps": [{"command": "file.executeFile", "params": {"path": path, "confirmed": true}}]});
+    let r = s.execute_for_script("engine.batch", steps).unwrap();
+    assert!(r.to_string().contains("needsConfirmation"), "{r}");
+    assert!(!opened(&mut s));
+    // The user's answer from the frontend's question still opens it.
+    assert!(s.execute("file.executeFile", json!({"path": path, "confirmed": true})).unwrap().get("opened").is_some());
+    assert!(opened(&mut s));
+    // With the warning off a script's request opens the file without a question, as before.
+    s.execute("prefs.set", json!({"key": "scripting.warnExecutingFiles", "value": false})).unwrap();
+    assert!(s.execute_for_script("file.executeFile", json!({"path": path})).unwrap().get("opened").is_some());
+}
+
 // ---------------------------------------------------------------- Edit ▸ History, recent lists
 
 #[test]
diff --git a/crates/engine/src/tests_menu_cmds.rs b/crates/engine/src/tests_menu_cmds.rs
index 1b5cca98..4e01e380 100644
--- a/crates/engine/src/tests_menu_cmds.rs
+++ b/crates/engine/src/tests_menu_cmds.rs
@@ -111,6 +111,38 @@ fn set_switch_others() {
     assert!(s.execute("layer.setSwitch", json!({"layers": [c], "switch": "nope", "others": true})).is_err());
 }
 
+/// A null's Video switch (the eye) works like any layer's, as in After Effects: it toggles,
+/// Alt-click and Hide Other Video take nulls along, and its children still follow it while it is
+/// hidden (parenting ignores the eye).
+#[test]
+fn null_video_switch() {
+    let mut s = comp();
+    let a = solid(&mut s, "#ff0000");
+    let n = s.execute("layer.newNull", json!({})).unwrap()["layer"].as_u64().unwrap();
+    s.execute("layer.setSwitch", json!({"layers": [n], "switch": "video"})).unwrap();
+    assert!(!layer(&s, n).switches.video);
+    s.execute("edit.undo", json!({})).unwrap();
+    assert!(layer(&s, n).switches.video);
+    // Alt-click on the solid's eye hides the null too; on the null's, the solid.
+    s.execute("layer.setSwitch", json!({"layers": [a], "switch": "video", "others": true})).unwrap();
+    assert!(layer(&s, a).switches.video && !layer(&s, n).switches.video);
+    s.execute("layer.setSwitch", json!({"layers": [n], "switch": "video", "others": true})).unwrap();
+    assert!(!layer(&s, a).switches.video && layer(&s, n).switches.video);
+    s.execute("layer.showAllVideo", json!({})).unwrap();
+    s.execute("layer.hideOtherVideo", json!({"layers": [a]})).unwrap();
+    assert!(layer(&s, a).switches.video && !layer(&s, n).switches.video);
+    // The hidden null still carries its child.
+    s.execute("layer.setParent", json!({"layers": [a], "parent": n})).unwrap();
+    s.execute("prop.set", json!({"layer": n, "path": "transform/position", "value": [420, 180, 0]})).unwrap();
+    let cid = s.active_comp_id().unwrap();
+    let c = s.project.comp(cid).unwrap().clone();
+    let ctx = effectcraft_render::EvalCtx::new(&s.project, cid, &c, Tick::ZERO);
+    let child = c.layer(effectcraft_project::LayerId(a)).unwrap();
+    let (m, _) = ctx.layer_to_comp(child);
+    let centre = m.apply(effectcraft_geom::vec2(100.0, 50.0));
+    assert!((centre.x - 420.0).abs() < 1e-6 && (centre.y - 180.0).abs() < 1e-6, "{centre:?}");
+}
+
 #[test]
 fn layer_switches_menu() {
     let mut s = comp();
diff --git a/crates/engine/src/tests_timeline.rs b/crates/engine/src/tests_timeline.rs
index 39a4d40b..14eb7dd4 100644
--- a/crates/engine/src/tests_timeline.rs
+++ b/crates/engine/src/tests_timeline.rs
@@ -410,6 +410,77 @@ fn pen_tool_draws_edits_and_closes_a_mask() {
     assert_eq!(s.active_comp().unwrap().layers[0].masks().unwrap().children.len(), 1);
 }
 
+/// Cut every mask path's tangent arrays in the saved project to one entry (static values and
+/// keyframes alike), then open the result: the shape of a hand-edited or foreign file (#1250).
+fn reopen_with_short_tangents(s: &mut Session) {
+    fn cut(v: &mut Value) {
+        match v {
+            Value::Object(o) => {
+                if o.contains_key("vertices") {
+                    for k in ["in_tangents", "out_tangents"] {
+                        if let Some(Value::Array(a)) = o.get_mut(k) {
+                            a.truncate(1);
+                        }
+                    }
+                }
+                o.values_mut().for_each(cut);
+            }
+            Value::Array(a) => a.iter_mut().for_each(cut),
+            _ => {}
+        }
+    }
+    let mut j: Value = serde_json::from_str(&s.project.to_json()).unwrap();
+    cut(&mut j);
+    let p = effectcraft_project::Project::from_json(&j.to_string()).unwrap();
+    s.replace_project(p, None);
+}
+
+#[test]
+fn vertex_commands_fill_in_missing_tangents_of_a_loaded_path() {
+    let (mut s, l) = setup();
+    let m = s.execute("mask.new", json!({"layer": l, "vertices": [[10, 10], [90, 10], [90, 90]]})).unwrap()["mask"].as_u64().unwrap();
+    reopen_with_short_tangents(&mut s);
+    let path = |s: &Session| prop(s, l, "masks/#1/path").value.as_path().unwrap().clone();
+    assert_eq!(path(&s).in_tangents.len(), 1, "the file really has short tangents");
+    // Both used to index the tangent arrays by vertex and panic.
+    s.execute("mask.setVertex", json!({"layer": l, "mask": m, "index": 2, "in": [0, -20], "out": [0, 20]})).unwrap();
+    s.execute("mask.addVertex", json!({"layer": l, "mask": m, "point": [10, 90]})).unwrap();
+    let p = path(&s);
+    assert_eq!(p.vertices.len(), 4);
+    assert_eq!((p.in_tangents.len(), p.out_tangents.len()), (4, 4));
+    assert_eq!((p.in_tangents[2], p.out_tangents[2]), ([0.0, -20.0], [0.0, 20.0]));
+    assert_eq!(p.in_tangents[1], [0.0, 0.0], "a missing tangent is a corner");
+}
+
+#[test]
+fn deleting_vertices_of_a_loaded_path_with_short_tangents_does_not_panic() {
+    let (mut s, l) = setup();
+    let m = s.execute("mask.new", json!({"layer": l, "vertices": [[10, 10], [90, 10], [90, 90]]})).unwrap()["mask"].as_u64().unwrap();
+    reopen_with_short_tangents(&mut s);
+    s.execute("mask.selectVertices", json!({"vertices": [{"layer": l, "mask": m, "index": 2}]})).unwrap();
+    s.execute("mask.deleteVertices", json!({})).unwrap();
+    let p = prop(&s, l, "masks/#1/path").value.as_path().unwrap().clone();
+    assert_eq!((p.vertices.len(), p.in_tangents.len(), p.out_tangents.len()), (2, 2, 2));
+}
+
+#[test]
+fn vertex_commands_fill_in_missing_tangents_of_a_loaded_animated_path() {
+    let (mut s, l) = setup();
+    let m = s.execute("mask.new", json!({"layer": l, "vertices": [[10, 10], [90, 10], [90, 90]]})).unwrap()["mask"].as_u64().unwrap();
+    s.execute("prop.toggleAnimation", json!({"layer": l, "path": "masks/#1/path"})).unwrap();
+    s.execute("time.set", json!({"time": 1.0})).unwrap();
+    s.execute("mask.setVertex", json!({"layer": l, "mask": m, "index": 0, "point": [0, 0]})).unwrap();
+    reopen_with_short_tangents(&mut s);
+    s.execute("time.set", json!({"time": 1.0})).unwrap();
+    s.execute("mask.setVertex", json!({"layer": l, "mask": m, "index": 2, "in": [5, 5]})).unwrap();
+    s.execute("mask.addVertex", json!({"layer": l, "mask": m, "index": 3, "point": [10, 90]})).unwrap();
+    for k in &prop(&s, l, "masks/#1/path").keys {
+        let p = k.value.as_path().unwrap();
+        assert_eq!(p.vertices.len(), 4, "the other key gains the vertex too");
+        assert!(p.in_tangents.len() == 4 && p.out_tangents.len() == 4, "{p:?}");
+    }
+}
+
 #[test]
 fn alt_click_stopwatch_toggles_a_self_reference_expression() {
     let (mut s, l) = setup();
diff --git a/crates/export/src/pipeline.rs b/crates/export/src/pipeline.rs
index a0093f4c..8dcee03e 100644
--- a/crates/export/src/pipeline.rs
+++ b/crates/export/src/pipeline.rs
@@ -48,22 +48,43 @@ pub(crate) fn gpu_inflight(var: Option<&str>) -> usize {
 /// one window of rendered images is held in memory. Chunks hold no lock or slot, so a failing
 /// or panicking frame cannot leak one, and nested parallelism (or a single thread) cannot
 /// deadlock.
+#[cfg(test)]
 pub(crate) fn map_frames<I: Send, T: Send>(
     ks: Vec<u64>,
     cap: Option<usize>,
     render: impl Fn(u64) -> I + Sync + Send,
     encode: impl Fn(u64, I) -> T + Sync + Send,
+) -> Vec<T> {
+    map_frames_while(ks, cap, || true, render, encode)
+}
+
+/// [`map_frames`] whose `cap` holds only while `capped()`: once it turns false (the GPU stopped
+/// for good, so every frame falls back to the CPU), the remaining frames render in parallel
+/// like the uncapped CPU path instead of one chunk of `cap` at a time.
+pub(crate) fn map_frames_while<I: Send, T: Send>(
+    ks: Vec<u64>,
+    cap: Option<usize>,
+    capped: impl Fn() -> bool,
+    render: impl Fn(u64) -> I + Sync + Send,
+    encode: impl Fn(u64, I) -> T + Sync + Send,
 ) -> Vec<T> {
     use rayon::prelude::*;
-    let Some(n) = cap.map(|n| n.max(1)) else {
+    let Some(n) = cap.map(|n| n.max(1)).filter(|_| capped()) else {
         return ks.into_par_iter().map(|k| encode(k, render(k))).collect();
     };
     let window = n.max(rayon::current_num_threads());
     let mut out = Vec::with_capacity(ks.len());
-    for win in ks.chunks(window) {
+    for (w, win) in ks.chunks(window).enumerate() {
+        if !capped() {
+            out.par_extend(ks[w * window..].par_iter().map(|&k| encode(k, render(k))));
+            break;
+        }
         let mut imgs = Vec::with_capacity(win.len());
-        for chunk in win.chunks(n) {
-            imgs.par_extend(chunk.par_iter().map(|&k| render(k)));
+        let mut i = 0;
+        while i < win.len() {
+            let end = if capped() { (i + n).min(win.len()) } else { win.len() };
+            imgs.par_extend(win[i..end].par_iter().map(|&k| render(k)));
+            i = end;
         }
         out.par_extend(win.par_iter().copied().zip(imgs.into_par_iter()).map(|(k, img)| encode(k, img)));
     }
@@ -187,7 +208,10 @@ impl<'a> Cx<'a> {
             }
             return out;
         }
-        map_frames(ks, self.gpu_cap(), |k| self.frame(comp, k), f)
+        // The cap is for the GPU's memory: once it has stopped for good, frames render on the
+        // CPU in parallel.
+        let gpu_live = || self.job.accel.is_none_or(|a| a.available());
+        map_frames_while(ks, self.gpu_cap(), gpu_live, |k| self.frame(comp, k), f)
     }
 
     /// GPU frames rendered at once (#879), decided once per batch: with a GPU accelerator every
@@ -453,6 +477,36 @@ mod tests {
         (out, max.load(Ordering::SeqCst))
     }
 
+    #[test]
+    fn frames_render_in_parallel_once_the_gpu_stops() {
+        // Every frame after the GPU stopped falls back to the CPU: the cap no longer applies.
+        use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
+        let pool = rayon::ThreadPoolBuilder::new().num_threads(4).build().unwrap();
+        let (live, now, max) = (AtomicBool::new(true), AtomicUsize::new(0), AtomicUsize::new(0));
+        let out = pool.install(|| {
+            map_frames_while(
+                (0..24).collect(),
+                Some(1),
+                || live.load(Ordering::SeqCst),
+                |k| {
+                    if k == 1 {
+                        live.store(false, Ordering::SeqCst);
+                    }
+                    let c = now.fetch_add(1, Ordering::SeqCst) + 1;
+                    if k >= 2 {
+                        max.fetch_max(c, Ordering::SeqCst);
+                    }
+                    std::thread::sleep(std::time::Duration::from_millis(20));
+                    now.fetch_sub(1, Ordering::SeqCst);
+                    k * 10
+                },
+                |_, v| v,
+            )
+        });
+        assert_eq!(out, (0..24).map(|k| k * 10).collect::<Vec<_>>());
+        assert!(max.load(Ordering::SeqCst) > 1, "frames after the GPU stopped ran one at a time");
+    }
+
     #[test]
     fn capped_frames_keep_their_order() {
         let want: Vec<u64> = (0..40).map(|k| k * 10).collect();
diff --git a/crates/expr/src/prelude.js b/crates/expr/src/prelude.js
index 5f6dd015..a1dff678 100644
--- a/crates/expr/src/prelude.js
+++ b/crates/expr/src/prelude.js
@@ -261,7 +261,10 @@ function noise(x) {
 function timeToFrames(t, fps, isDuration) {
   if (t === undefined) t = time + thisComp.displayStartTime;
   if (fps === undefined) fps = 1 / __S.fd;
-  return Math.floor(t * fps + 1e-6);
+  var frames = t * fps;
+  // The 1e-6 keeps a whole number of frames that floating point overshoots (31/24 - 5/24) whole.
+  if (isDuration && frames !== 0) return frames < 0 ? Math.floor(frames + 1e-6) : Math.ceil(frames - 1e-6);
+  return Math.floor(frames + 1e-6);
 }
 
 function framesToTime(frames, fps) {
diff --git a/crates/expr/src/tests.rs b/crates/expr/src/tests.rs
index d71db390..8a4db485 100644
--- a/crates/expr/src/tests.rs
+++ b/crates/expr/src/tests.rs
@@ -1285,3 +1285,80 @@ fn layer_control_property_stands_for_its_layer() {
     assert_close!(f.num("effect('Map')(1).transform.scale[0]", 0.0), 100.0);
     assert_close!(f.num("effect('Map')(1).value.name == 'B' ? 1 : 0", 0.0), 1.0);
 }
+
+#[test]
+fn time_to_frames_rounds_durations_away_from_zero() {
+    let f = fx();
+    // Adobe's public expression reference distinguishes durations from absolute times.
+    // Expected integer counts are literal values, independent of the implementation.
+    for (expression, expected) in [
+        ("timeToFrames(-0.01, 24, true)", -1.0),
+        ("timeToFrames(-0.05, 24, true)", -2.0),
+        ("timeToFrames(0, 24, true)", 0.0),
+        ("timeToFrames(-0.125, 24, true)", -3.0),
+        ("timeToFrames(0.125, 24, true)", 3.0),
+        ("timeToFrames(0.01, 24, true)", 1.0),
+        ("timeToFrames(0.05, 24, true)", 2.0),
+    ] {
+        assert_eq!(f.num(expression, 0.0), expected, "{expression}");
+    }
+}
+
+#[test]
+fn time_to_frames_rounds_absolute_times_toward_negative_infinity() {
+    let f = fx();
+    for (expression, expected) in [
+        ("timeToFrames(-0.01, 24, false)", -1.0),
+        ("timeToFrames(-0.05, 24, false)", -2.0),
+        ("timeToFrames(0, 24, false)", 0.0),
+        ("timeToFrames(-0.125, 24, false)", -3.0),
+        ("timeToFrames(0.125, 24, false)", 3.0),
+        ("timeToFrames(0.01, 24, false)", 0.0),
+        ("timeToFrames(0.05, 24, false)", 1.0),
+    ] {
+        assert_eq!(f.num(expression, 0.0), expected, "{expression}");
+    }
+}
+
+#[test]
+fn time_to_frames_preserves_default_arguments() {
+    let f = fx();
+    // The fixture's composition is 30 fps with displayStartTime = 0.
+    for (expression, evaluation_time, expected) in [
+        ("timeToFrames(0.01, 24)", 0.0, 0.0),
+        ("timeToFrames(-0.01, 24)", 0.0, -1.0),
+        ("timeToFrames(0.05)", 0.0, 1.0),
+        ("timeToFrames(-0.05)", 0.0, -2.0),
+        ("timeToFrames()", 0.0, 0.0),
+        ("timeToFrames()", 0.05, 1.0),
+        ("timeToFrames()", -0.05, -2.0),
+        ("timeToFrames(undefined, 24, true)", 0.05, 2.0),
+        ("timeToFrames(0.05, undefined, true)", 0.0, 2.0),
+    ] {
+        assert_eq!(f.num(expression, evaluation_time), expected, "{expression} at {evaluation_time}s");
+    }
+}
+
+#[test]
+fn time_to_frames_preserves_coercion_and_small_durations() {
+    let f = fx();
+    // Duration rounding must not erase tiny nonzero values; absolute times keep the existing tolerance.
+    for (expression, expected) in [
+        ("timeToFrames('0.05', '24', false)", 1.0),
+        ("timeToFrames('0.05', '24', true)", 2.0),
+        ("timeToFrames('-0.05', '24', true)", -2.0),
+        ("timeToFrames(null, 24, true)", 0.0),
+        ("timeToFrames(0.05, null, true)", 0.0),
+        ("timeToFrames(0.05, 0, true)", 0.0),
+        ("timeToFrames(31 / 24 - 5 / 24, 24, true)", 26.0),
+        ("timeToFrames(5 / 24 - 31 / 24, 24, true)", -26.0),
+        ("timeToFrames(-1e-10, 24, false)", 0.0),
+        ("1 / timeToFrames(-0, 24, true) === Infinity ? 1 : 0", 1.0),
+        ("isNaN(timeToFrames(NaN, 24, true)) ? 1 : 0", 1.0),
+        ("timeToFrames(Infinity, 24, true) === Infinity ? 1 : 0", 1.0),
+        ("timeToFrames(-Infinity, 24, true) === -Infinity ? 1 : 0", 1.0),
+        ("var calls = 0; var t = {valueOf: function () { calls++; return 0.05; }}; timeToFrames(t, 24, true) + 100 * calls", 102.0),
+    ] {
+        assert_eq!(f.num(expression, 0.0), expected, "{expression}");
+    }
+}
diff --git a/crates/gpu/src/lib.rs b/crates/gpu/src/lib.rs
index 252145c1..1cff8be0 100644
--- a/crates/gpu/src/lib.rs
+++ b/crates/gpu/src/lib.rs
@@ -317,6 +317,10 @@ impl Accelerator for Gpu {
         self.ctx.name.clone()
     }
 
+    fn available(&self) -> bool {
+        self.ctx.check_health().is_ok()
+    }
+
     fn comp_frame(&self, r: &Renderer, comp: ItemId, t: Tick) -> Option<Image> {
         let img = self.render(r, comp, t);
         if img.is_none() {
diff --git a/crates/gpu/src/shaders/fx_color.wgsl b/crates/gpu/src/shaders/fx_color.wgsl
index c7d6010e..6b8641dd 100644
--- a/crates/gpu/src/shaders/fx_color.wgsl
+++ b/crates/gpu/src/shaders/fx_color.wgsl
@@ -154,8 +154,9 @@ fn fxc_point(@builtin(global_invocation_id) gid: vec3<u32>) {
                 let i = u32(max(floor(hp), 0.0)) % 6u;
                 let f = hp - floor(hp);
                 let wt = w[i] + (w[(i + 1u) % 6u] - w[i]) * f;
-                let base = luminance(c);
-                let gray = max(base + (wt - 0.5) * hsl.y * 0.6, 0.0);
+                let mx = max(max(c.x, c.y), c.z);
+                let mn = min(min(c.x, c.y), c.z);
+                let gray = max(mn + (mx - mn) * wt, 0.0);
                 var o = vec3<f32>(gray);
                 if (P.u[0].y != 0u) {
                     o = hsl_to_rgb(P.f[2].x, P.f[2].y, min(gray, 1.0));
diff --git a/crates/gpu/src/tests.rs b/crates/gpu/src/tests.rs
index 532e313f..24f8c961 100644
--- a/crates/gpu/src/tests.rs
+++ b/crates/gpu/src/tests.rs
@@ -49,18 +49,29 @@ pub(crate) fn hold_gpu_lock() {
 
 /// The shared test device (the calling test holds [`hold_gpu_lock`]).
 pub(crate) fn gpu() -> Option<&'static Gpu> {
-    static G: OnceLock<Option<Gpu>> = OnceLock::new();
+    static G: OnceLock<Result<Gpu, String>> = OnceLock::new();
     hold_gpu_lock();
-    G.get_or_init(|| {
-        let g = Gpu::headless();
-        if g.is_none() {
-            eprintln!("effectcraft-gpu tests: no GPU adapter, skipping GPU comparisons");
-        } else if let Some(g) = &g {
-            eprintln!("effectcraft-gpu tests: adapter {}", g.ctx.name);
+    let g = G.get_or_init(|| {
+        let g = Gpu::try_headless();
+        match &g {
+            Ok(g) => eprintln!("effectcraft-gpu tests: adapter {}", g.ctx.name),
+            Err(e) => eprintln!("effectcraft-gpu tests: no GPU ({e}), skipping GPU comparisons"),
         }
         g
-    })
-    .as_ref()
+    });
+    require_gpu("effectcraft-gpu tests", g.as_ref())
+}
+
+/// `g`, or `None` (the GPU tests skip) when there is no GPU, unless `EFFECTCRAFT_REQUIRE_GPU=1`
+/// (as in `tests_init`): then a GPU that didn't start fails the test, with why.
+pub(crate) fn require_gpu<G>(tests: &str, g: Result<G, &String>) -> Option<G> {
+    match g {
+        Ok(g) => Some(g),
+        Err(e) if std::env::var("EFFECTCRAFT_REQUIRE_GPU").is_ok_and(|v| v == "1") => {
+            panic!("{tests}: EFFECTCRAFT_REQUIRE_GPU=1 but GPU initialization failed: {e}")
+        }
+        Err(_) => None,
+    }
 }
 
 /// The test device is on wgpu's OpenGL backend (Mesa's llvmpipe on the FreeBSD CI job).
diff --git a/crates/gpu/src/tests_adv3d.rs b/crates/gpu/src/tests_adv3d.rs
index ee99c5c0..869c60aa 100644
--- a/crates/gpu/src/tests_adv3d.rs
+++ b/crates/gpu/src/tests_adv3d.rs
@@ -17,11 +17,13 @@ use crate::Gpu;
 /// A device of the test's own (the test holds [`crate::tests::hold_gpu_lock`]).
 fn gpu() -> Option<Gpu> {
     crate::tests::hold_gpu_lock();
-    let g = Gpu::headless();
-    if g.is_none() {
-        eprintln!("effectcraft-gpu adv3d tests: no GPU adapter, skipping");
+    match Gpu::try_headless() {
+        Ok(g) => Some(g),
+        Err(e) => {
+            eprintln!("effectcraft-gpu adv3d tests: no GPU ({e}), skipping");
+            crate::tests::require_gpu("effectcraft-gpu adv3d tests", Err(&e))
+        }
     }
-    g
 }
 
 fn add(p: &mut Project, cid: ItemId, src: LayerSource, edit: impl FnOnce(&mut effectcraft_project::Layer)) {
diff --git a/crates/gpu/src/tests_deferred.rs b/crates/gpu/src/tests_deferred.rs
index e798bd8f..b6e43b55 100644
--- a/crates/gpu/src/tests_deferred.rs
+++ b/crates/gpu/src/tests_deferred.rs
@@ -17,19 +17,19 @@ use crate::tests::{Pattern, Scene, diff, n, set, tolerance, v3};
 /// The device, held exclusively: deferred state is per device and a frame renders at a time
 /// (a frame worker renders one frame at a time too).
 pub(crate) fn deferred_gpu() -> Option<(&'static Gpu, std::sync::MutexGuard<'static, ()>)> {
-    static G: OnceLock<Option<Gpu>> = OnceLock::new();
+    static G: OnceLock<Result<Gpu, String>> = OnceLock::new();
     static LOCK: std::sync::Mutex<()> = std::sync::Mutex::new(());
     // Also no other GPU test while it runs (see `hold_gpu_lock`).
     crate::tests::hold_gpu_lock();
-    let g = G
-        .get_or_init(|| {
-            let g = pollster::block_on(Gpu::request_deferred()).map_err(|e| eprintln!("deferred gpu tests skipped: {e}")).ok();
-            if let Some(g) = &g {
-                eprintln!("deferred gpu tests: adapter {}", g.ctx.name);
-            }
-            g
-        })
-        .as_ref()?;
+    let g = G.get_or_init(|| {
+        let g = pollster::block_on(Gpu::request_deferred());
+        match &g {
+            Ok(g) => eprintln!("deferred gpu tests: adapter {}", g.ctx.name),
+            Err(e) => eprintln!("deferred gpu tests: no GPU ({e}), skipping"),
+        }
+        g
+    });
+    let g = crate::tests::require_gpu("deferred gpu tests", g.as_ref())?;
     Some((g, LOCK.lock().unwrap_or_else(|e| e.into_inner())))
 }
 
diff --git a/crates/gpu/src/tests_fx_color.rs b/crates/gpu/src/tests_fx_color.rs
index 28e80278..a3fe3f65 100644
--- a/crates/gpu/src/tests_fx_color.rs
+++ b/crates/gpu/src/tests_fx_color.rs
@@ -29,6 +29,7 @@ fn color_balance_vibrance_tritone_mixer() {
 fn black_white_colorama_selective_color() {
     effect_case("ec.color.blackwhite", &[]);
     effect_case("ec.color.blackwhite", &[("reds", n(120.0)), ("blues", n(-50.0)), ("cyans", n(200.0)), ("tint", on())]);
+    effect_case("ec.color.blackwhite", &[("yellows", n(300.0)), ("greens", n(-200.0)), ("magentas", n(0.0))]);
     effect_case("ec.color.colorama", &[]);
     effect_case("ec.color.colorama", &[("inputPhase/mode", e(4)), ("inputPhase/phaseShift", n(75.0)), ("outputCycle/cycles", n(2.5)), ("blend", n(40.0))]);
     effect_case("ec.color.colorama", &[("inputPhase/mode", e(8)), ("outputCycle/cycles", n(1.3))]);
diff --git a/crates/keyframe/src/value.rs b/crates/keyframe/src/value.rs
index fa66711b..1dff4477 100644
--- a/crates/keyframe/src/value.rs
+++ b/crates/keyframe/src/value.rs
@@ -42,6 +42,16 @@ impl ShapePath {
     pub fn len(&self) -> usize {
         self.vertices.len()
     }
+    /// Give both tangent arrays one entry per vertex: missing tangents become zero (a corner),
+    /// extra ones are dropped. The three arrays are read independently from a project file, so a
+    /// loaded path can disagree with itself (#1250). Returns whether anything changed.
+    pub fn fit_tangents(&mut self) -> bool {
+        let n = self.vertices.len();
+        let changed = self.in_tangents.len() != n || self.out_tangents.len() != n;
+        self.in_tangents.resize(n, [0.0; 2]);
+        self.out_tangents.resize(n, [0.0; 2]);
+        changed
+    }
     /// Number of segments (vertex to next vertex, the closing one included).
     pub fn segment_count(&self) -> usize {
         let n = self.vertices.len();
diff --git a/crates/lottie/src/shapes.rs b/crates/lottie/src/shapes.rs
index d7e3cc08..1283a249 100644
--- a/crates/lottie/src/shapes.rs
+++ b/crates/lottie/src/shapes.rs
@@ -308,7 +308,7 @@ pub(crate) fn export_items(ex: &mut Ex, contents: &PropGroup, label: &str) -> Ve
             "op" => {
                 o.put("a", "amount", &anim::num);
                 o.raw("lj", json!(o.e("join") + 1));
-                o.raw("ml", json!(o.f("miter")));
+                o.put("ml", "miter", &anim::num);
                 if (o.f("copies") - 1.0).abs() > 1e-9 || o.animated("copies") || o.f("copyOffset") != 0.0 {
                     o.ex.warn(format!("{lbl}: Offset Paths copies are not part of Lottie (one copy exported)"));
                 }
@@ -543,9 +543,7 @@ pub(crate) fn import_items(im: &mut Im, ids: &mut Ids, items: &[Json]) -> Vec<Pr
                         if let Some(lj) = int(j, "lj") {
                             set_enum(&mut g, "join", lj.saturating_sub(1).clamp(0, 2) as u32);
                         }
-                        if let (Some(ml), Some(p)) = (j.get("ml").and_then(Json::as_f64), g.get_mut("miter")) {
-                            p.value = Value::Scalar(ml);
-                        }
+                        set(im, &mut g, "miter", j.get("ml"), &anim::to_scalar);
                     }
                     "pb" => set(im, &mut g, "amount", j.get("a"), &anim::to_scalar),
                     "tw" => {
diff --git a/crates/lottie/src/tests.rs b/crates/lottie/src/tests.rs
index a677def1..19aac0f9 100644
--- a/crates/lottie/src/tests.rs
+++ b/crates/lottie/src/tests.rs
@@ -358,6 +358,55 @@ fn path_operators_roundtrip() {
     compare_renders(&p, cid, &q, nc, 2.0 / 255.0);
 }
 
+#[test]
+fn offset_paths_miter_uses_animatable_lottie_value() {
+    let (mut p, cid) = setup();
+    let l = shape_layer(&mut p, cid, |ids| {
+        let mut animated = build::shape_simple_op(ids, "offset").unwrap();
+        animated.get_mut("miter").unwrap().keys = vec![Keyframe::new(s(0.0), Value::Scalar(5.0)), Keyframe::new(s(1.0), Value::Scalar(9.0))];
+        let mut constant = build::shape_simple_op(ids, "offset").unwrap();
+        constant.get_mut("miter").unwrap().value = Value::Scalar(6.0);
+        let mut stroke = build::shape_stroke(ids, [1.0, 1.0, 1.0, 1.0], 2.0);
+        stroke.get_mut("miter").unwrap().value = Value::Scalar(7.0);
+        vec![animated, constant, stroke]
+    });
+    push(&mut p, cid, l);
+
+    let (q, nc, warnings, json) = roundtrip(&p, cid, &ExportOptions::default());
+    assert!(warnings.is_empty(), "{warnings:?}");
+    let shapes = &json["layers"][0]["shapes"];
+    assert_eq!(shapes[0]["ty"], "op");
+    assert_eq!(shapes[0]["ml"]["a"], json!(1));
+    assert_eq!(shapes[0]["ml"]["k"][0]["s"], json!([5.0]));
+    assert_eq!(shapes[0]["ml"]["k"][1]["s"], json!([9.0]));
+    assert_eq!(shapes[1]["ml"], json!({"a": 0, "k": 6.0}));
+    assert_eq!(shapes[2]["ty"], "st");
+    assert_eq!(shapes[2]["ml"], json!(7.0));
+    assert!(compare_comps(&p, cid, &q, nc) > 10);
+    let restored = &q.comp(nc).unwrap().layers[0];
+    assert_eq!(restored.props.group("contents/offset").unwrap().get("miter").unwrap().keys.len(), 2);
+
+    // Previously exported Offset Paths have a scalar ml; they remain importable.
+    let mut old = json;
+    old["layers"][0]["shapes"][1]["ml"] = json!(6.0);
+    let mut legacy = Project::default();
+    let bytes = serde_json::to_vec(&old).unwrap();
+    let imported = import(&mut legacy, &bytes, "Legacy", "", &mut |_| None).unwrap();
+    let constant = &legacy.comp(imported.comp).unwrap().layers[0].props;
+    let second = constant
+        .sub("contents")
+        .unwrap()
+        .children
+        .iter()
+        .filter_map(|n| match n {
+            Node::Group(g) if g.match_id == "offset" => Some(g),
+            _ => None,
+        })
+        .nth(1)
+        .unwrap();
+    assert_eq!(second.get("miter").unwrap().value, Value::Scalar(6.0));
+}
+
 // ---------------------------------------------------------------- layers
 
 #[test]
diff --git a/crates/pdf/src/cff.rs b/crates/pdf/src/cff.rs
index 275b75aa..61bb7f9e 100644
--- a/crates/pdf/src/cff.rs
+++ b/crates/pdf/src/cff.rs
@@ -848,7 +848,9 @@ impl T2<'_> {
                 }
                 11 => return,
                 14 => {
-                    self.take_width(false);
+                    // A width precedes the operands when the count is odd (5 with seac, 1 alone);
+                    // the no-width counts (0 and 4) are even, like the stems' and rmoveto's.
+                    self.take_width(true);
                     if self.stack.len() >= 4 {
                         let n = self.stack.len();
                         let s = &self.stack[n - 4..];
@@ -1145,4 +1147,46 @@ mod tests {
         let cff = Cff::parse(&out).expect("the damaged Private DICT is skipped, the font parses");
         assert_eq!(cff.glyph_count(), 1);
     }
+
+    /// A four-operand `endchar` (`adx ady bchar achar`, no width) is a seac like the Type 1
+    /// interpreter's: `endchar` must not eat `adx` as a width, and a five-operand one reads its
+    /// width first.
+    #[test]
+    fn endchar_reads_its_width_by_operand_count() {
+        let enc = |v: i32| -> Vec<u8> {
+            if (-107..=107).contains(&v) {
+                vec![(v + 139) as u8]
+            } else {
+                let mut o = vec![28];
+                o.extend_from_slice(&(v as i16).to_be_bytes());
+                o
+            }
+        };
+        // The base glyph: a square drawn without a width (`500 500 -500 hlineto endchar`).
+        let mut square = vec![];
+        for v in [500, 500, -500] {
+            square.extend(enc(v));
+        }
+        square.extend([6, 14]);
+        // Four operands: `adx ady bchar achar endchar`, no width to take.
+        let mut seac = vec![];
+        for v in [10, 20, 65, 65] {
+            seac.extend(enc(v));
+        }
+        seac.push(14);
+        let font = write_test_cff(&[(".notdef", vec![14]), ("A", square.clone()), ("Aacute", seac)]);
+        let cff = Cff::parse(&font).unwrap();
+        let (p, _) = cff.outline(cff.gid_by_name("Aacute").unwrap()).unwrap();
+        assert!(!p.elements().is_empty(), "the base glyph of the seac is part of the outline");
+        // Five operands: the first is the width, the last four the seac.
+        let mut wide = vec![];
+        for v in [600, 0, 0, 65, 65] {
+            wide.extend(enc(v));
+        }
+        wide.push(14);
+        let font = write_test_cff(&[(".notdef", vec![14]), ("A", square), ("Awide", wide)]);
+        let cff = Cff::parse(&font).unwrap();
+        let (_, w) = cff.outline(cff.gid_by_name("Awide").unwrap()).unwrap();
+        assert_eq!(w, 600.0);
+    }
 }
diff --git a/crates/pdf/src/image.rs b/crates/pdf/src/image.rs
index 2c8adda6..4d55fef8 100644
--- a/crates/pdf/src/image.rs
+++ b/crates/pdf/src/image.rs
@@ -184,6 +184,11 @@ fn mask_image(file: &File, o: &Obj, soft: bool) -> Option<(Vec<u8>, usize, usize
         return Some((data.into_iter().step_by(jpeg_n.unwrap_or(1)).take(w * h).collect(), w, h));
     }
     let bpc = if soft { file.get_num(d, "BitsPerComponent").unwrap_or(8.0) as usize } else { 1 };
+    // Like `decode()`: only 1/2/4/8/16-bit depths are supported. Anything else (notably
+    // `bpc >= 32`, where `1u32 << bpc` below would overflow) means "no usable mask".
+    if !matches!(bpc, 1 | 2 | 4 | 8 | 16) {
+        return None;
+    }
     let max = ((1u32 << bpc) - 1).max(1) as f64;
     let dec = file.get(d, "Decode").map(|x| file.nums(x)).filter(|v| v.len() >= 2);
     let v = unpack(&data, w, h, 1, bpc);
diff --git a/crates/pdf/src/tests_import.rs b/crates/pdf/src/tests_import.rs
index 7cebcd43..4ea29801 100644
--- a/crates/pdf/src/tests_import.rs
+++ b/crates/pdf/src/tests_import.rs
@@ -274,11 +274,32 @@ fn inline_image_with_absurd_dimensions_falls_back_to_ei_scan() {
     assert!(!doc.skipped.is_empty());
     // A length just under `usize::MAX` passes the row math; past byte 4096 of the content the
     // caller's `start + len` would then overflow.
-    let content = format!("{}q 10 0 0 10 0 0 cm BI /W 2305843009213693440 /H 8 /CS /G /BPC 8 ID  EI Q", " ".repeat(5000));
+    let content = format!("{}q 10 0 0 10 0 0 cm BI /W 2305843009213693440 /H 8 /CS /G /BPC 8 ID \0 EI Q", " ".repeat(5000));
     let doc = parse(&page_pdf(&content, "", vec![])).unwrap();
     let _ = render(&doc);
 }
 
+#[test]
+fn smask_with_absurd_bpc_is_ignored_not_fatal() {
+    // `/BitsPerComponent 32` in a soft mask: `1u32 << bpc` must neither panic (debug)
+    // nor mistranslate samples into alpha (release); the mask is treated as absent.
+    let bytes = page_pdf(
+        "q 2 0 0 2 0 0 cm /Im Do Q",
+        "/XObject << /Im 10 0 R >>",
+        vec![
+            (
+                10,
+                "<< /Type /XObject /Subtype /Image /Width 2 /Height 2 /ColorSpace /DeviceGray /BitsPerComponent 8 /SMask 11 0 R >>".into(),
+                Some(vec![0x80; 4]),
+            ),
+            (11, "<< /Type /XObject /Subtype /Image /Width 2 /Height 2 /ColorSpace /DeviceGray /BitsPerComponent 32 >>".into(), Some(vec![0xFF; 16])),
+        ],
+    );
+    let doc = parse(&bytes).unwrap();
+    let img = render(&doc);
+    assert!(coverage(&img, 0, 0, 200, 100) > 0.0, "image still draws, opaque");
+}
+
 #[test]
 fn truncated_and_corrupt_eps_never_panic() {
     let eps = b"%!PS-Adobe-3.0 EPSF-3.0\n%%BoundingBox: 0 0 100 100\n\
diff --git a/crates/render/src/lib.rs b/crates/render/src/lib.rs
index 0f02b465..cfefd02d 100644
--- a/crates/render/src/lib.rs
+++ b/crates/render/src/lib.rs
@@ -455,6 +455,12 @@ pub trait Accelerator: Send + Sync {
     fn auto_pick(&self) -> Option<&AutoPick> {
         None
     }
+    /// Whether the accelerator can still render frames. `false` once it has stopped for good
+    /// (its device was lost or retired): every frame it is asked for falls back to the CPU, so
+    /// callers that limit frames in flight for it can stop doing so.
+    fn available(&self) -> bool {
+        true
+    }
     /// Deferred readbacks: where a GPU readback cannot be waited for (WebGPU in a browser
     /// worker), a frame renders in *passes*. A readback the accelerator does not have yet is
     /// started, the step returns a cheap placeholder and the pass is marked missed
diff --git a/crates/render/src/shapes.rs b/crates/render/src/shapes.rs
index aa46fa50..bd59ad83 100644
--- a/crates/render/src/shapes.rs
+++ b/crates/render/src/shapes.rs
@@ -542,10 +542,25 @@ fn draw_bounds(d: &Draw, paths: &[BezPath]) -> Option<kurbo::Rect> {
         Paint::Gradient { stroke: Some(style), .. } => Some(style),
         _ => None,
     };
-    let grow = stroke.map_or(1.0, |style| style.width * style.miter.max(1.0) * 0.5 * d.xf.mean_scale().max(1.0) + 1.0);
+    let grow = stroke.map_or(1.0, |style| style.width * stroke_reach(style, paths) * 0.5 * d.xf.mean_scale().max(1.0) + 1.0);
     Some(b.inflate(grow, grow))
 }
 
+/// How far a stroke can reach past its path, in half widths: the miter limit only where a
+/// miter join exists (a path of two or more segments, or a closed one), √2 at square cap
+/// corners, else one. Padding every stroke by the miter limit made a 1080 px straight line
+/// (a wipe matte) a 4326×6366 buffer, ~440 MB per layer per frame.
+fn stroke_reach(style: &StrokeStyle, paths: &[BezPath]) -> f64 {
+    if style.is_variable() {
+        // Taper and Wave can widen the stroke: keep the widest padding.
+        return style.miter.max(std::f64::consts::SQRT_2);
+    }
+    let joins =
+        style.join == Join::Miter && paths.iter().any(|p| p.segments().nth(1).is_some() || p.elements().iter().any(|e| matches!(e, kurbo::PathEl::ClosePath)));
+    let cap = if style.cap == Cap::Square { std::f64::consts::SQRT_2 } else { 1.0 };
+    if joins { style.miter.max(cap) } else { cap }
+}
+
 /// Local-space visual bounds of a draw, as After Effects' layer bounds (`sourceRectAtTime` with
 /// extents): the path bounds, plus half the stroke width for strokes. No anti-aliasing or miter
 /// padding, so snapping and Align put edges exactly together (#352).
diff --git a/crates/render/src/shapes/tests.rs b/crates/render/src/shapes/tests.rs
index 0a5d6893..3946fc9d 100644
--- a/crates/render/src/shapes/tests.rs
+++ b/crates/render/src/shapes/tests.rs
@@ -424,3 +424,40 @@ fn radial_gradient_highlight_moves_the_focal_point() {
     // The outer circle is unchanged: points just outside it are black in both.
     assert!(a.get(100, 182)[0] < 0.03 && b.get(100, 182)[0] < 0.03 && b.get(100, 17)[0] < 0.03);
 }
+
+/// The layer-space buffer `super::render` draws the comp's only shape layer into.
+fn shape_buf(p: &Project, cid: ItemId) -> effectcraft_effects::Buf {
+    let comp = p.comp(cid).unwrap();
+    let ctx = crate::eval::EvalCtx::new(p, cid, comp, Tick::ZERO);
+    let layer = &comp.layers[0];
+    super::render(&ctx, layer, layer.props.sub("contents").unwrap(), 1.0)
+}
+
+#[test]
+fn straight_stroke_buffer_is_not_padded_by_the_miter_limit() {
+    // A 1080 px wide vertical wipe (a track matte): no joins, so the buffer is the line plus half
+    // the width, not 4× (Miter Limit 4) the width on every side (4326×6366, ~440 MB per frame).
+    let (p, cid) = shape_comp_sized(1080, 1920, |ids| vec![line_path(ids, [0.0, 1020.0], [0.0, -1020.0]), build::shape_stroke(ids, RED, 1080.0)]);
+    let b = shape_buf(&p, cid);
+    assert!(b.img.width <= 1090 && b.img.height <= 3130, "{}×{}", b.img.width, b.img.height);
+}
+
+#[test]
+fn miter_corner_still_fits_its_buffer() {
+    // A sharp V with a 20 px miter-joined stroke: the miter tip reaches well past half the width.
+    let (p, cid) = shape_comp(|ids| {
+        let sp = effectcraft_keyframe::ShapePath {
+            vertices: vec![[-40.0, -30.0], [0.0, 20.0], [40.0, -30.0]],
+            in_tangents: vec![[0.0; 2]; 3],
+            out_tangents: vec![[0.0; 2]; 3],
+            closed: false,
+            feather: Vec::new(),
+        };
+        vec![build::shape_path(ids, sp), build::shape_stroke(ids, RED, 20.0)]
+    });
+    // The miter tip of the V points down from (100, 70): its pixels are drawn, not clipped.
+    let img = frame(&p, cid);
+    assert!(alpha(&img, 100, 80) > 0.9, "{}", alpha(&img, 100, 80));
+    let b = shape_buf(&p, cid);
+    assert!(b.img.height as f64 >= 50.0 + 20.0 * 4.0 * 0.5, "{}", b.img.height);
+}
diff --git a/crates/script/src/lib.rs b/crates/script/src/lib.rs
index 067b85fd..19904c2a 100644
--- a/crates/script/src/lib.rs
+++ b/crates/script/src/lib.rs
@@ -106,5 +106,9 @@ mod tests_ui_more;
 // #760: `$.evalFile` and `BridgeTalk`.
 #[cfg(test)]
 mod tests_evalfile;
+// `/browser/…` is the web editor's file table, an absolute path on wasm; on Windows it has no
+// drive, so the script runtime resolves it under the current drive, where the host holds nothing.
+#[cfg(all(test, not(windows)))]
+mod tests_services;
 #[cfg(test)]
 mod tests_ui_mouse;
diff --git a/crates/script/src/runtime.rs b/crates/script/src/runtime.rs
index ce51c573..192da574 100644
--- a/crates/script/src/runtime.rs
+++ b/crates/script/src/runtime.rs
@@ -157,11 +157,16 @@ pub(crate) fn exec(s: &mut Session, id: &str, params: J) -> Result<J, String> {
         s.state.selected_layers.clear();
     }
     let r = s.execute_for_script(id, params);
-    if let Some(c) = target
-        && prev != Some(c)
-        && s.state.active_comp == Some(c)
-        && id != "comp.open"
-    {
+    if let Some(c) = target {
+        leave_comp(s, id, c, prev);
+    }
+    r.map_err(|e| e.to_string())
+}
+
+/// After a script's command on comp `c`, make `prev` (the comp active before it) active again,
+/// unless the command opened `c` on purpose; with no comp to go back to, `c` stays open.
+fn leave_comp(s: &mut Session, id: &str, c: effectcraft_engine::project::ItemId, prev: Option<effectcraft_engine::project::ItemId>) {
+    if prev != Some(c) && s.state.active_comp == Some(c) && id != "comp.open" {
         match prev {
             Some(p) if s.project.comp(p).is_some() => s.activate_comp(p),
             _ => {
@@ -171,7 +176,6 @@ pub(crate) fn exec(s: &mut Session, id: &str, params: J) -> Result<J, String> {
             }
         }
     }
-    r.map_err(|e| e.to_string())
 }
 
 /// Run a keyframe command that acts on the selected keys (`keys.velocity`, `keys.interpolation`,
@@ -195,11 +199,17 @@ fn exec_on_keys(s: &mut Session, id: &str, params: J, targets: &J) -> Result<J,
         let key = l.props.find(prop).and_then(|pr| pr.keys.get(usize::try_from(index).ok()?)).ok_or("the keyframe no longer exists")?;
         keys.push(KeyRef { layer: LayerId(layer), prop, time: key.time });
     }
+    // Make the keys' comp active before selecting them: activating a comp brings back the key
+    // selection it had, which would replace these keys and leave the command nothing to act on
+    // when the comp isn't the active one (#1531).
+    let prev = s.state.active_comp;
+    s.activate_comp(cid);
     let saved = std::mem::replace(&mut s.state.selected_keys, keys);
     let r = exec(s, id, params);
     let comp = s.active_comp();
     let exists = |k: &KeyRef| comp.and_then(|c| c.layer(k.layer)).and_then(|l| l.props.find(k.prop)).is_some_and(|pr| pr.keys.iter().any(|x| x.time == k.time));
     s.state.selected_keys = saved.into_iter().filter(exists).collect();
+    leave_comp(s, id, cid, prev);
     r
 }
 
@@ -336,9 +346,19 @@ pub(crate) fn normalize(p: &str) -> std::path::PathBuf {
     // Resolve symlinks where the file (or its folder) exists, so links can't escape the project.
     std::fs::canonicalize(&out)
         .or_else(|_| out.parent().map(std::fs::canonicalize).unwrap_or(Ok(out.clone())).map(|d| d.join(out.file_name().unwrap_or_default())))
+        .map(without_verbatim_prefix)
         .unwrap_or(out)
 }
 
+/// A canonical Windows drive path without its `\\?\` prefix, so it compares with a lexical one
+/// (a path whose folder doesn't exist on disk stays lexical).
+fn without_verbatim_prefix(p: std::path::PathBuf) -> std::path::PathBuf {
+    match p.to_str().and_then(|s| s.strip_prefix(r"\\?\")) {
+        Some(plain) if plain.as_bytes().get(1) == Some(&b':') => plain.into(),
+        _ => p,
+    }
+}
+
 pub(crate) const GATE: &str = "Preferences ▸ Scripting & Expressions ▸ Allow Scripts to Write Files and Access Network";
 
 /// The file-access gate: reads under the project's folder are always allowed; other reads, all
@@ -380,11 +400,14 @@ fn native_file(_: &JsValue, args: &[JsValue], ctx: &mut Context) -> JsResult<JsV
         }
         let s = &a.session;
         match op.as_str() {
-            "access" => Ok(json!(check_access(s, &path, false)?.exists())),
+            // Through the session's services, like the reads: hosts without a file system (the
+            // browser's file table) answer for their own files.
+            "access" => Ok(json!(s.services.exists(&check_access(s, &path, false)?.to_string_lossy()))),
             "exists" | "isDir" => {
                 // Unreadable locations report "missing" instead of failing.
                 let Ok(p) = check_access(s, &path, false) else { return Ok(json!(false)) };
-                Ok(json!(if op == "exists" { p.exists() } else { p.is_dir() }))
+                let p = p.to_string_lossy();
+                Ok(json!(if op == "exists" { s.services.exists(&p) } else { s.services.is_dir(&p) }))
             }
             "read" | "readBinary" => {
                 let p = check_access(s, &path, false)?;
@@ -834,4 +857,14 @@ mod nesting_tests {
         assert_eq!(out.result, serde_json::json!(2));
         assert!(check_nesting(&("(".repeat(MAX_NESTING) + &")".repeat(MAX_NESTING))).is_ok());
     }
+
+    /// A canonical drive path and a lexical one compare once the `\\?\` prefix is gone; a UNC
+    /// share and a Unix path are left as they are.
+    #[test]
+    fn only_a_verbatim_drive_prefix_is_dropped() {
+        use std::path::PathBuf;
+        assert_eq!(without_verbatim_prefix(r"\\?\C:\proj\a.txt".into()), PathBuf::from(r"C:\proj\a.txt"));
+        assert_eq!(without_verbatim_prefix(r"\\?\UNC\server\share\a.txt".into()), PathBuf::from(r"\\?\UNC\server\share\a.txt"));
+        assert_eq!(without_verbatim_prefix("/proj/a.txt".into()), PathBuf::from("/proj/a.txt"));
+    }
 }
diff --git a/crates/script/src/tests.rs b/crates/script/src/tests.rs
index 80d75ef7..109b0974 100644
--- a/crates/script/src/tests.rs
+++ b/crates/script/src/tests.rs
@@ -442,6 +442,32 @@ fn save_frame_to_png_writes_behind_the_file_gate() {
     let _ = std::fs::remove_dir_all(&dir);
 }
 
+/// #1246: with Warn User When Executing Files on, a script that asserts `confirmed` itself still
+/// gets the question; only the user's answer opens the file.
+#[test]
+fn a_script_cannot_confirm_executing_a_file_for_itself() {
+    let dir = std::env::temp_dir().join(format!("ec-script-exec-{}", std::process::id()));
+    std::fs::create_dir_all(&dir).unwrap();
+    let f = dir.join("run.txt");
+    std::fs::write(&f, "x").unwrap();
+    let q = serde_json::to_string(&f.to_string_lossy()).unwrap();
+    let mut s = session();
+    // The user allows file access; the warning stays on (the default).
+    s.execute("prefs.set", json!({"key": "scripting.allowScriptsWriteFiles", "value": true})).unwrap();
+    s.drain_events();
+    let opened = |s: &mut Session| s.drain_events().iter().any(|e| matches!(e, effectcraft_engine::Event::OpenUrl(_)));
+    for code in [
+        format!("JSON.stringify(app.run('file.executeFile', {{path: {q}, confirmed: true}}))"),
+        format!("JSON.stringify(app.run('engine.batch', {{steps: [{{command: 'file.executeFile', params: {{path: {q}, confirmed: true}}}}]}}))"),
+        format!("new File({q}).execute()"),
+    ] {
+        let o = ok(&mut s, &code);
+        assert!(!o.result.to_string().contains("opened") || o.result == json!(false), "{code}: {:?}", o.result);
+        assert!(!opened(&mut s), "{code} opened the file without asking");
+    }
+    let _ = std::fs::remove_dir_all(&dir);
+}
+
 /// #590: a script can't give itself file and network access (or turn off the warning before
 /// executing files) by changing Settings ▸ Scripting & Expressions; the user still can.
 #[test]
@@ -1270,6 +1296,36 @@ fn effect_parameter_interpolation_and_ease() {
     assert_eq!(o.result, json!([true, true, 16.67, 33.33, true]));
 }
 
+/// #1531: the per-key methods act on a comp that isn't the active one too. Activating the keys'
+/// comp brought back its own (empty) key selection over the keys named, so the interpolation and
+/// the ease were silently dropped once another comp with a layer had been made first.
+#[test]
+fn key_interpolation_and_ease_apply_outside_the_active_comp() {
+    let mut s = session();
+    let o = ok(
+        &mut s,
+        r#"
+        var a = app.project.items.addComp("A", 400, 400, 1, 10, 20); a.layers.addNull();
+        var c = app.project.items.addComp("C", 400, 400, 1, 10, 20);
+        var n = c.layers.addNull(); n.threeDLayer = true;
+        var p = n.property("ADBE Transform Group").property("ADBE Rotate Y");
+        p.setValueAtTime(1, 0); p.setValueAtTime(2, -178);
+        for (var j = 1; j <= 2; j++) {
+          p.setInterpolationTypeAtKey(j, KeyframeInterpolationType.BEZIER, KeyframeInterpolationType.BEZIER);
+          p.setTemporalEaseAtKey(j, [new KeyframeEase(0, 60)], [new KeyframeEase(0, 60)]);
+        }
+        [p.keyOutInterpolationType(1) == KeyframeInterpolationType.BEZIER,
+         p.keyInInterpolationType(2) == KeyframeInterpolationType.BEZIER,
+         p.keyOutTemporalEase(1)[0].influence,
+         Math.round(p.valueAtTime(1.25, false) * 100) / 100]
+        "#,
+    );
+    let v = o.result;
+    assert_eq!((&v[0], &v[1], &v[2]), (&json!(true), &json!(true), &json!(60)), "{v}");
+    // Eased, not the linear -44.5.
+    assert!(v[3].as_f64().is_some_and(|x| (x - -44.5).abs() > 1.0), "{v}");
+}
+
 /// #808: sourcePointToComp and compPointToSource follow the layer's transform.
 #[test]
 fn source_point_conversions_follow_the_layer_transform() {
diff --git a/crates/script/src/tests_services.rs b/crates/script/src/tests_services.rs
new file mode 100644
index 00000000..c0ecfab4
--- /dev/null
+++ b/crates/script/src/tests_services.rs
@@ -0,0 +1,47 @@
+//! Scripts see the host's files: existence checks go through `Services`, like reads, so a host
+//! that keeps files in memory (the web editor's browser storage) answers for its own files.
+
+use std::collections::HashMap;
+use std::sync::{Arc, Mutex};
+
+use effectcraft_engine::{Services, Session};
+
+use crate::run_code;
+
+#[derive(Default)]
+struct Mem(Mutex<HashMap<String, Vec<u8>>>);
+
+impl Services for Mem {
+    fn read_file(&self, path: &str) -> std::io::Result<Vec<u8>> {
+        self.0.lock().unwrap().get(path).cloned().ok_or_else(|| std::io::Error::new(std::io::ErrorKind::NotFound, path.to_string()))
+    }
+    fn write_file(&self, path: &str, data: &[u8]) -> std::io::Result<()> {
+        self.0.lock().unwrap().insert(path.into(), data.into());
+        Ok(())
+    }
+    fn exists(&self, path: &str) -> bool {
+        self.0.lock().unwrap().contains_key(path)
+    }
+    fn is_dir(&self, path: &str) -> bool {
+        path == "/browser/footage"
+    }
+}
+
+#[test]
+fn a_script_opens_a_file_only_the_host_holds() {
+    let mem = Arc::new(Mem::default());
+    mem.write_file("/browser/data.txt", b"hello").unwrap();
+    let mut s = Session { services: mem, ..Default::default() };
+    crate::install(&mut s);
+    // A project in a folder that isn't on disk: scripts may read files next to it.
+    s.path = Some("/browser/project.ecproj".into());
+    let out = run_code(
+        &mut s,
+        r#"var f = new File("/browser/data.txt"); var ok = f.open("r");
+        writeLn(ok + " " + (ok ? f.read() : f.error));
+        writeLn(new File("/browser/missing.txt").exists + " " + new Folder("/browser/footage").exists);"#,
+        "t.jsx",
+    );
+    assert!(out.error.is_none(), "{:?}", out.error);
+    assert_eq!(out.output, vec!["true hello".to_string(), "false true".to_string()]);
+}
diff --git a/crates/ui-egui/src/i18n/effects.rs b/crates/ui-egui/src/i18n/effects.rs
index 3ab11558..5c6d09ba 100644
--- a/crates/ui-egui/src/i18n/effects.rs
+++ b/crates/ui-egui/src/i18n/effects.rs
@@ -439,13 +439,56 @@ const TRADITIONAL_CHINESE: &[Row] = &[];
 /// `CC` series, the `VR` set, the `OCIO` set, `Cryptomatte`, `EXtractoR`, `IDentifier`,
 /// `Key Light`, `Unmult`, `Twirl (Legacy)` and the two EffectCraft-only effects) repeat that
 /// English name here rather than being left out.
-const JAPANESE_EFFECTS: &[Row] = &[];
+///
+/// The rows below were read from the installed After Effects 2026 (26.5) Japanese interface
+/// (its generated Effect menu and its Effects & Presets panel).
+const JAPANESE_EFFECTS: &[Row] = &[
+    ("ec.blur.bilateral", "Bilateral Blur", "ブラー（バイラテラル）"),
+    ("ec.blur.cameralens", "Camera Lens Blur", "ブラー（カメラレンズ）"),
+    ("ec.blur.channel", "Channel Blur", "ブラー（チャンネル）"),
+    ("ec.blur.compound", "Compound Blur", "ブラー（合成）"),
+    ("ec.blur.directional", "Directional Blur", "ブラー（方向）"),
+    ("ec.blur.fastbox", "Fast Box Blur", "高速ボックスブラー"),
+    ("ec.blur.gaussian", "Gaussian Blur", "ブラー（ガウス）"),
+    ("ec.blur.radial", "Radial Blur", "ブラー（放射状）"),
+    ("ec.color.lumetri", "Lumetri Color", "Lumetri カラー"),
+    ("ec.key.colorkey", "Color Key", "カラーキー"),
+    ("ec.key.luma", "Luma Key", "ルミナンスキー"),
+    ("ec.key.spill", "Spill Suppressor", "スピルサプレッション"),
+    ("ec.obsolete.basic3d", "Basic 3D", "基本 3D"),
+    ("ec.obsolete.basictext", "Basic Text", "基本テキスト"),
+    ("ec.obsolete.gaussianlegacy", "Gaussian Blur (Legacy)", "ブラー（ガウス）（レガシー）"),
+    ("ec.obsolete.lightning", "Lightning", "稲妻"),
+    ("ec.obsolete.pathtext", "Path Text", "パステキスト"),
+    ("ec.time.pixelmotionblur", "Pixel Motion Blur", "ピクセルモーションブラー"),
+];
 
 /// Traditional Chinese (`zh-hant`) category labels, keyed by the registry's English category.
 const TRADITIONAL_CHINESE_CATEGORIES: &[(&str, &str)] = &[];
 
 /// Japanese (`ja`) category labels, keyed by the registry's English category.
-const JAPANESE_CATEGORIES: &[(&str, &str)] = &[];
+const JAPANESE_CATEGORIES: &[(&str, &str)] = &[
+    ("3D Channel", "3D チャンネル"),
+    ("Audio", "オーディオ"),
+    ("Blur & Sharpen", "ブラー＆シャープ"),
+    ("Channel", "チャンネル"),
+    ("Color Correction", "カラー補正"),
+    ("Distort", "ディストーション"),
+    ("Expression Controls", "式制御"),
+    ("Immersive Video", "イマーシブビデオ"),
+    ("Keying", "キーイング"),
+    ("Matte", "マット"),
+    ("Noise & Grain", "ノイズ＆グレイン"),
+    ("Obsolete", "旧バージョン"),
+    ("Paint", "描画"),
+    ("Perspective", "遠近"),
+    ("Simulation", "シミュレーション"),
+    ("Stylize", "スタイライズ"),
+    ("Text", "テキスト"),
+    ("Time", "時間"),
+    ("Transition", "トランジション"),
+    ("Utility", "ユーティリティ"),
+];
 
 /// The 21 category folder names the generated Effect menu and Effects & Presets draw, in
 /// Simplified Chinese. Read from the installed After Effects 2026 (26.5.0.89) Simplified Chinese
@@ -521,14 +564,17 @@ mod tests {
 
     /// The languages that have no rows yet, with the table a translator fills in for each. A new
     /// language is added here and to [`catalog`]; the test then guards its rows as they arrive.
-    const PENDING: &[(&str, &[Row])] = &[("zh-hant", TRADITIONAL_CHINESE), ("ja", JAPANESE_EFFECTS)];
+    const PENDING: &[(&str, &[Row])] = &[("zh-hant", TRADITIONAL_CHINESE)];
+
+    /// The languages whose tables are being filled in: guarded like [`PENDING`] row by row.
+    const PARTIAL: &[(&str, &[Row])] = &[("ja", JAPANESE_EFFECTS)];
 
     /// A pending language may lag Simplified Chinese but may not invent ids or disagree about
     /// which effect an id names: a translator fills these tables row by row. While they are
     /// empty the test is a no-op, which is why the slot ships before the data does.
     #[test]
     fn a_pending_language_only_uses_known_ids() {
-        for (language, rows) in PENDING {
+        for (language, rows) in PENDING.iter().chain(PARTIAL) {
             let mut ids: Vec<&str> = vec![];
             for (id, english, translated) in *rows {
                 let Some((_, hans_english, _)) = SIMPLIFIED_CHINESE.iter().find(|(hans_id, _, _)| hans_id == id) else {
@@ -606,6 +652,9 @@ mod tests {
         assert_eq!(category("Blur & Sharpen"), "模糊和锐化");
         assert_eq!(name("ec.unknown.effect", "Mystery"), "Mystery");
         assert_eq!(category("Not A Category"), "Not A Category");
+        set_current("ja");
+        assert_eq!(name("ec.blur.gaussian", "Gaussian Blur"), "ブラー（ガウス）");
+        assert_eq!(name("ec.unknown.effect", "Mystery"), "Mystery", "a row a partial table lacks draws the registry name");
         set_current("en");
     }
 
diff --git a/crates/ui-egui/src/i18n/ui.rs b/crates/ui-egui/src/i18n/ui.rs
index 58cbe834..9831092d 100644
--- a/crates/ui-egui/src/i18n/ui.rs
+++ b/crates/ui-egui/src/i18n/ui.rs
@@ -291,6 +291,7 @@ const JAPANESE: &[(&str, &str)] = &[
     ("Layer {}", "レイヤー{}"),
     ("Layer:", "レイヤー:"),
     ("Layer: {}", "レイヤー：{}"),
+    ("Layer Styles", "レイヤースタイル"),
     ("Learn", "学習"),
     ("Leave all attributes in \"{}\"", "すべての属性を「{}」に残す"),
     ("Licence: {}", "ライセンス：{}"),
@@ -836,6 +837,7 @@ const SIMPLIFIED_CHINESE: &[(&str, &str)] = &[
     ("Layer {}", "图层 {}"),
     ("Layer:", "图层："),
     ("Layer: {}", "图层：{}"),
+    ("Layer Styles", "图层样式"),
     ("Learn", "学习"),
     ("Leave all attributes in \"{}\"", "将所有属性保留在“{}”中"),
     ("Licence: {}", "许可：{}"),
@@ -1569,6 +1571,7 @@ const TRADITIONAL_CHINESE: &[(&str, &str)] = &[
     ("Layer {}", "圖層 {}"),
     ("Layer:", "圖層："),
     ("Layer: {}", "圖層：{}"),
+    ("Layer Styles", "圖層樣式"),
     ("Learn", "學習"),
     ("Leave all attributes in \"{}\"", "將所有屬性保留在“{}”中"),
     ("Licence: {}", "許可：{}"),
@@ -2305,6 +2308,7 @@ const UKRAINIAN: &[(&str, &str)] = &[
     ("Layer {}", "Шар {}"),
     ("Layer:", "Шар:"),
     ("Layer: {}", "Шар: {}"),
+    ("Layer Styles", "Стилі шару"),
     ("Learn", "Навчання"),
     ("Leave all attributes in \"{}\"", "Залишити всі атрибути в «{}»"),
     ("Licence: {}", "Ліцензія: {}"),
@@ -2856,6 +2860,7 @@ const PORTUGUESE: &[(&str, &str)] = &[
     ("Layer {}", "Camada {}"),
     ("Layer:", "Camada:"),
     ("Layer: {}", "Camada: {}"),
+    ("Layer Styles", "Estilos de camada"),
     ("Learn", "Aprender"),
     ("Leave all attributes in \"{}\"", "Manter todos os atributos em \"{}\""),
     ("Licence: {}", "Licença: {}"),
@@ -3308,6 +3313,7 @@ const CZECH: &[(&str, &str)] = &[
     ("Layer {}", "Vrstva {}"),
     ("Layer:", "Vrstva:"),
     ("Layer: {}", "Vrstva: {}"),
+    ("Layer Styles", "Styly vrstvy"),
     ("Learn", "Výuka"),
     ("Leave all attributes in \"{}\"", "Ponechat všechny atributy v „{}“"),
     ("Licence: {}", "Licence: {}"),
@@ -3865,6 +3871,7 @@ const SPANISH: &[(&str, &str)] = &[
     ("Layer {}", "Capa {}"),
     ("Layer:", "Capa:"),
     ("Layer: {}", "Capa: {}"),
+    ("Layer Styles", "Estilos de capa"),
     ("Learn", "Aprender"),
     ("Leave all attributes in \"{}\"", "Dejar todos los atributos en \"{}\""),
     ("Licence: {}", "Licencia: {}"),
diff --git a/crates/ui-egui/src/menus.rs b/crates/ui-egui/src/menus.rs
index 5be1e80a..605582ba 100644
--- a/crates/ui-egui/src/menus.rs
+++ b/crates/ui-egui/src/menus.rs
@@ -1526,6 +1526,19 @@ pub(crate) fn panel_shown(app: &EffectcraftApp, p: PanelKind) -> bool {
     }
 }
 
+/// The command a menu entry runs when chosen from a menu: Window ▸ <panel> closes a panel whose
+/// entry is checked, as in After Effects (#1630). Shortcuts and agents calling `window.panel`
+/// still only show the panel.
+pub(crate) fn menu_choice(app: &EffectcraftApp, id: String, params: Value) -> (String, Value) {
+    if id == "window.panel"
+        && let Some(p) = params.get("panel").and_then(Value::as_str).and_then(PanelKind::from_name)
+        && panel_shown(app, p)
+    {
+        return ("window.closePanel".into(), params);
+    }
+    (id, params)
+}
+
 /// Check-mark state of frontend toggles (engine state is answered by the engine).
 pub(crate) fn entry_checked(app: &EffectcraftApp, e: &MenuEntry) -> Option<bool> {
     let v = &app.ui.viewer;
@@ -2075,7 +2088,7 @@ pub fn menu_bar(app: &mut EffectcraftApp, ui: &mut egui::Ui) {
             egui::Popup::close_id(&ctx, top);
         }
     }
-    if let Some((id, params)) = clicked
+    if let Some((id, params)) = clicked.map(|(id, params)| menu_choice(app, id, params))
         && let Err(e) = invoke(app, &ctx, &id, if params.is_null() { json!({}) } else { params })
     {
         app.ui.status = e;
diff --git a/crates/ui-egui/src/native_menu.rs b/crates/ui-egui/src/native_menu.rs
index 3e098449..ad30ded5 100644
--- a/crates/ui-egui/src/native_menu.rs
+++ b/crates/ui-egui/src/native_menu.rs
@@ -376,6 +376,7 @@ pub fn activate(app: &mut EffectcraftApp, ctx: &egui::Context, menu: &NativeMenu
         }
     }
     let params = if params.is_null() { json!({}) } else { params };
+    let (command, params) = crate::menus::menu_choice(app, command, params);
     let r = crate::menus::invoke(app, ctx, &command, params);
     if let Err(e) = &r {
         app.ui.status = e.clone();
@@ -612,6 +613,23 @@ mod tests {
         assert!(spec2.items().iter().any(|i| i.command == "file.openRecent" && i.label == "Recent Test.ecproj"));
     }
 
+    /// #1630: a checked Window menu entry closes its panel; an unchecked one opens it.
+    #[test]
+    fn window_menu_entry_toggles_its_panel() {
+        use crate::dock::PanelKind;
+        let mut app = app();
+        let ctx = egui::Context::default();
+        let choose = |app: &mut EffectcraftApp| {
+            let spec = build(app);
+            let id = spec.items().into_iter().find(|i| i.command == "window.panel" && i.params["panel"] == "align").unwrap().id.clone();
+            activate(app, &ctx, &spec, &id).unwrap();
+        };
+        choose(&mut app);
+        assert!(app.ui.dock.contains(PanelKind::Align));
+        choose(&mut app);
+        assert!(!app.ui.dock.contains(PanelKind::Align));
+    }
+
     #[test]
     fn activation_dispatches_the_menu_command() {
         let mut app = app();
diff --git a/crates/ui-egui/src/panels/expr_editor.rs b/crates/ui-egui/src/panels/expr_editor.rs
index f800b1a4..f342d563 100644
--- a/crates/ui-egui/src/panels/expr_editor.rs
+++ b/crates/ui-egui/src/panels/expr_editor.rs
@@ -2,6 +2,7 @@
 //! Font Size, Syntax Highlighting, Line Numbers, Auto-complete (Tab accepts), Bracket Matching
 //! and Word Wrap. The Composition viewer uses the shared diagnostics in `expr_bar`.
 
+use effectcraft_engine::commands::expr_tools::language_menu;
 use effectcraft_engine::prefs::Scripting;
 use egui::text::{LayoutJob, TextFormat};
 use egui::{Color32, FontId, Rect, Stroke, pos2, vec2};
@@ -211,6 +212,37 @@ pub fn completions(text: &str, cursor: usize) -> (String, Vec<&'static str>) {
     (word, c)
 }
 
+/// How `name` is called, from the Expression Language menu's signatures: `None` for a
+/// property, `Some(true)` for a function that takes arguments, `Some(false)` for one that never
+/// does.
+fn call_shape(name: &str) -> Option<bool> {
+    let calls: Vec<&str> =
+        language_menu().into_iter().flat_map(|(_, items)| items).filter_map(|(_, text)| text.strip_prefix(name)?.strip_prefix('(')).collect();
+    (!calls.is_empty()).then(|| calls.iter().any(|rest| !rest.starts_with(')')))
+}
+
+/// Accepts the first auto-complete candidate at char index `cursor`: inserts the rest of the
+/// name, plus `()` for a function (#1393), and returns the new cursor: between the parentheses,
+/// or after them when the function takes no arguments.
+pub fn accept_completion(buf: &mut String, cursor: usize) -> Option<usize> {
+    let (word, cands) = completions(buf, cursor);
+    let first = cands.first()?;
+    let at = byte_of(buf, cursor);
+    let rest = &first[word.len()..];
+    let end = cursor + first.chars().count() - word.chars().count();
+    let already_called = buf.get(at..).is_some_and(|after| after.starts_with('('));
+    match call_shape(first).filter(|_| !already_called) {
+        Some(takes_args) => {
+            buf.insert_str(at, &format!("{rest}()"));
+            Some(end + if takes_args { 1 } else { 2 })
+        }
+        None => {
+            buf.insert_str(at, rest);
+            Some(end)
+        }
+    }
+}
+
 /// Colour runs for JavaScript: (byte start, byte end, colour).
 pub fn highlight(text: &str, base: Color32, sx: &Syntax) -> Vec<(usize, usize, Color32)> {
     let b = text.as_bytes();
@@ -320,15 +352,10 @@ pub fn editor(ui: &mut egui::Ui, id: egui::Id, buf: &mut String, rect: Rect, p:
     if p.auto_complete
         && child.memory(|m| m.has_focus(id))
         && let Some(c) = cursor
+        && !completions(buf, c).1.is_empty()
+        && child.input_mut(|i| i.consume_key(egui::Modifiers::NONE, egui::Key::Tab))
     {
-        let (word, cands) = completions(buf, c);
-        if let Some(first) = cands.first()
-            && child.input_mut(|i| i.consume_key(egui::Modifiers::NONE, egui::Key::Tab))
-        {
-            let at = byte_of(buf, c);
-            buf.insert_str(at, &first[word.len()..]);
-            accepted = Some(c + first.chars().count() - word.chars().count());
-        }
+        accepted = accept_completion(buf, c);
     }
     let out = egui::TextEdit::multiline(buf)
         .id(id)
@@ -446,3 +473,37 @@ mod contrast_tests {
         assert_eq!(col("// note"), Some(sx.comment));
     }
 }
+
+#[cfg(test)]
+mod completion_tests {
+    use super::*;
+
+    /// #1393: accepting a function inserts the call, with the cursor between the parentheses
+    /// (after them when the function takes no arguments); a property stays a bare name.
+    #[test]
+    fn accepting_a_function_completion_inserts_the_call() {
+        let mut buf = String::from("x = loopO");
+        assert_eq!(accept_completion(&mut buf, 9), Some(12));
+        assert_eq!(buf, "x = loopOut()");
+
+        let mut buf = String::from("wigg");
+        assert_eq!(accept_completion(&mut buf, 4), Some(7));
+        assert_eq!(buf, "wiggle()");
+
+        let mut buf = String::from("isClo");
+        assert_eq!(accept_completion(&mut buf, 5), Some(10));
+        assert_eq!(buf, "isClosed()");
+
+        let mut buf = String::from("tim");
+        assert_eq!(accept_completion(&mut buf, 3), Some(4));
+        assert_eq!(buf, "time");
+    }
+
+    /// Completing a name already followed by its call does not add a second pair.
+    #[test]
+    fn accepting_before_an_existing_call_keeps_one_pair_of_parentheses() {
+        let mut buf = String::from("loopO(\"cycle\")");
+        assert_eq!(accept_completion(&mut buf, 5), Some(7));
+        assert_eq!(buf, "loopOut(\"cycle\")");
+    }
+}
diff --git a/crates/ui-egui/src/panels/graph.rs b/crates/ui-egui/src/panels/graph.rs
index fc6d40e8..0b372c0a 100644
--- a/crates/ui-egui/src/panels/graph.rs
+++ b/crates/ui-egui/src/panels/graph.rs
@@ -109,6 +109,15 @@ fn shown_dims(l: &Layer, pr: &Property) -> usize {
     if pr.shown_dims > 0 && !l.is_3d() { (pr.shown_dims as usize).min(n) } else { n.min(4) }
 }
 
+/// The speed graph's value of dimension `d` at layer time `lt` (one curve for a spatial property).
+fn speed_at(pr: &Property, spatial: bool, d: usize, lt: Tick) -> f64 {
+    if spatial {
+        effectcraft_engine::keyframe::speed(&pr.keys, lt, true)
+    } else {
+        effectcraft_engine::keyframe::velocity(&pr.keys, lt, false).get(d).copied().unwrap_or(0.0).abs()
+    }
+}
+
 /// Build the curves for the visible time span.
 fn curves<'a>(app: &EffectcraftApp, comp: &'a Comp, ectx: &EvalCtx, tm: TMap, plot: Rect, speed: bool) -> Vec<Curve<'a>> {
     let sel = &app.session.state.selected_keys;
@@ -126,16 +135,7 @@ fn curves<'a>(app: &EffectcraftApp, comp: &'a Comp, ectx: &EvalCtx, tm: TMap, pl
                 let x = plot.min.x + plot.width() * i as f32 / (n - 1) as f32;
                 let ct = tm.t(x);
                 let tt = Tick::from_seconds_f64(ct);
-                let v = if speed {
-                    let lt = l.layer_time(tt);
-                    if spatial {
-                        effectcraft_engine::keyframe::speed(&pr.keys, lt, true)
-                    } else {
-                        effectcraft_engine::keyframe::velocity(&pr.keys, lt, false).get(d).copied().unwrap_or(0.0).abs()
-                    }
-                } else {
-                    ectx.at(tt).value(l, pr).components().get(d).copied().unwrap_or(0.0)
-                };
+                let v = if speed { speed_at(pr, spatial, d, l.layer_time(tt)) } else { ectx.at(tt).value(l, pr).components().get(d).copied().unwrap_or(0.0) };
                 pts.push((ct, v));
             }
             let mut keys = vec![];
@@ -290,7 +290,7 @@ pub(crate) fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, p: &egui::Painte
     ctx.data_mut(|d| d.insert_temp(was_speed_id, speed));
     if ctx.data_mut(|d| d.remove_temp::<bool>(fit_pending_id())).unwrap_or(false) || type_changed {
         if cs.iter().any(|c| c.keys.iter().any(|k| k.sel)) {
-            fit_selection(app, &cs, tm, plot);
+            fit_selection(app, &cs, tm, plot, speed);
         } else {
             fit_all(app);
         }
@@ -584,7 +584,7 @@ pub(crate) fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, p: &egui::Painte
         fit_all(app);
     }
     if text_button(app, ui, p, &mut buttons, y, "Fit Selection", false, "fitSelection", "Fit selection to view") {
-        fit_selection(app, &cs, tm, plot);
+        fit_selection(app, &cs, tm, plot, speed);
     }
     buttons.x += 6.0;
     let (snap, reference, tbox) = (app.ui.timeline.graph_snap, app.ui.timeline.graph_reference, app.ui.timeline.graph_transform_box);
@@ -646,7 +646,7 @@ pub(crate) fn track_open(ctx: &egui::Context, on: bool) {
 }
 
 /// Zoom time and value to the selected keys (and their handles).
-fn fit_selection(app: &mut EffectcraftApp, cs: &[Curve], tm: TMap, plot: Rect) {
+fn fit_selection(app: &mut EffectcraftApp, cs: &[Curve], tm: TMap, plot: Rect, speed: bool) {
     let mut t0 = f64::INFINITY;
     let mut t1 = f64::NEG_INFINITY;
     let mut v0 = f64::INFINITY;
@@ -678,6 +678,26 @@ fn fit_selection(app: &mut EffectcraftApp, cs: &[Curve], tm: TMap, plot: Rect) {
             }
         }
     }
+    // In the speed graph eased keys sit at speed 0 and the curve peaks between them (#1617):
+    // frame the curve from the first to the last selected key. A lone key has its handles on
+    // the speed graph, so the check above misses it: it frames its neighbouring segments here.
+    if speed {
+        for c in cs {
+            let (Some(first), Some(last)) = (c.keys.iter().position(|k| k.sel), c.keys.iter().rposition(|k| k.sel)) else { continue };
+            let (a, b) = if first == last { (first.saturating_sub(1), last + 1) } else { (first, last) };
+            let (Some(ka), Some(kb)) = (c.keys.get(a), c.keys.get(b.min(c.keys.len().saturating_sub(1)))) else { continue };
+            t0 = t0.min(ka.t);
+            t1 = t1.max(kb.t);
+            let (s0, s1) = (ka.time.seconds(), kb.time.seconds());
+            const SAMPLES: usize = 128;
+            for i in 0..=SAMPLES {
+                let lt = Tick::from_seconds_f64(s0 + (s1 - s0) * i as f64 / SAMPLES as f64);
+                let v = speed_at(c.prop, !c.editable, c.dim, lt);
+                v0 = v0.min(v);
+                v1 = v1.max(v);
+            }
+        }
+    }
     let span = (t1 - t0).max(0.2);
     let pps = plot.width() as f64 * 0.8 / span;
     // Through the timeline's zoom, so the fit never zooms out past the whole comp.
diff --git a/crates/ui-egui/src/panels/timeline.rs b/crates/ui-egui/src/panels/timeline.rs
index d9c5b207..bee453a2 100644
--- a/crates/ui-egui/src/panels/timeline.rs
+++ b/crates/ui-egui/src/panels/timeline.rs
@@ -1996,8 +1996,11 @@ pub fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, rect: Rect) {
                 gp.line_segment([pos2(graph_x0, r.max.y - 0.5), pos2(r.max.x, r.max.y - 0.5)], Stroke::new(1.0, t.app_bg));
                 // A/V features.
                 let sw = &layer.switches;
+                // Every layer has the Video switch (the eye), nulls, cameras and lights included,
+                // as in After Effects: it hides a null's outline in the viewer and turns a camera or
+                // light off.
                 let av_items: [(Icon, bool, &str, bool); 4] = [
-                    (Icon::Eye, sw.video, "video", layer.source.is_av()),
+                    (Icon::Eye, sw.video, "video", true),
                     (Icon::Speaker, sw.audio, "audio", layer.props.sub("audio").is_some()),
                     (Icon::Solo, sw.solo, "solo", layer.source.is_av()),
                     (Icon::Lock, sw.locked, "lock", true),
@@ -2404,6 +2407,16 @@ pub fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, rect: Rect) {
                     },
                 );
                 gp.rect_filled(Rect::from_min_max(pos2(graph_x0, r.min.y), r.max), 0.0, t.tl_bg);
+                // An effect's colour label (26.5): the same bar the Effect Controls header wears,
+                // on the row's left edge.
+                if let Some(lab) =
+                    group.filter(|g| matches!(g.kind, GroupKind::Effect { .. })).and_then(|g| g.label).filter(|l| *l != effectcraft_engine::color::Label::None)
+                {
+                    let [lr, lg, lb] = app.session.prefs.label_rgb(lab);
+                    let bar = Rect::from_min_size(left.min, vec2(4.0, left.height()));
+                    lp.rect_filled(bar, 0.0, Color32::from_rgb(lr, lg, lb));
+                    app.auto.add(&format!("timeline.group.{uid}.label"), bar, &app.session.prefs.label_name(lab));
+                }
                 let indent = cw.name + 6.0 + 14.0 * row.depth as f32;
                 if *has_children {
                     let tw = Rect::from_center_size(pos2(indent, cy), vec2(13.0, 13.0));
@@ -3334,8 +3347,18 @@ pub fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, rect: Rect) {
     {
         let released = ctx.input(|i| i.pointer.any_released());
         if let crate::panels::DragPayload::Effect(e) = payload.as_ref() {
-            p.rect_stroke(rows_rect, 0.0, Stroke::new(2.0, t.accent), StrokeKind::Inside);
             let target = hit_rows.iter().find(|(r, _)| ptr.y >= r.min.y && ptr.y < r.max.y).map(|(_, row)| row.layer);
+            // The layer the effect would land on (its row and its open properties) is the one
+            // that lights up, not the whole timeline.
+            if let Some(l) = target
+                && let Some(span) = hit_rows.iter().filter(|(_, row)| row.layer == l).map(|(r, _)| *r).reduce(|a, b| a.union(b))
+            {
+                let lit = span.intersect(rows_rect);
+                let rp = p.with_clip_rect(rows_rect);
+                rp.rect_filled(lit, 0.0, t.accent.gamma_multiply(0.18));
+                rp.rect_stroke(lit, 0.0, Stroke::new(2.0, t.accent), StrokeKind::Inside);
+                app.auto.add("timeline.dropTarget", lit, "Drop target layer");
+            }
             if released && let Some(l) = target {
                 actions.push(("effect.apply".into(), json!({"effect": e, "layers": [l.0]})));
             }
@@ -3935,6 +3958,7 @@ pub(crate) fn layer_menu(ui: &mut egui::Ui, layers: &[u64], caps: LayerMenuCaps,
             }
         })
     });
+    ui.menu_button(crate::i18n::tr("Layer Styles"), |ui| layer_styles_submenu(ui, layers, &mut item));
     ui.menu_button(crate::i18n::tr("Effects"), |ui| effects_submenu(ui, layers, &mut item));
     ui.menu_button(crate::i18n::tr("Arrange"), |ui| {
         item(ui, "Bring Layer to Front", "layer.arrange", json!({"layers": layers, "to": "front"}));
@@ -3949,6 +3973,31 @@ pub(crate) fn layer_menu(ui: &mut egui::Ui, layers: &[u64], caps: LayerMenuCaps,
     item(ui, "Delete", "edit.clear", json!({"layers": layers}));
 }
 
+/// The layer context menu's Layer Styles submenu, matching the Layer ▸ Layer Styles application menu.
+fn layer_styles_submenu(ui: &mut egui::Ui, layers: &[u64], item: &mut dyn FnMut(&mut egui::Ui, &str, &str, serde_json::Value)) {
+    item(ui, "Layer Style Options...", "layer.style.options", json!({}));
+    ui.separator();
+    item(ui, "Convert to Editable Styles", "layer.style.convertToEditable", json!({"layers": layers}));
+    item(ui, "Show All", "layer.style.showAll", json!({"layers": layers}));
+    item(ui, "Remove All", "layer.style.removeAll", json!({"layers": layers}));
+    ui.separator();
+    for (id, label) in effectcraft_engine::project::styles::STYLES {
+        let cmd = match *id {
+            "dropShadow" => "layer.style.dropShadow",
+            "innerShadow" => "layer.style.innerShadow",
+            "outerGlow" => "layer.style.outerGlow",
+            "innerGlow" => "layer.style.innerGlow",
+            "bevelEmboss" => "layer.style.bevelEmboss",
+            "satin" => "layer.style.satin",
+            "colorOverlay" => "layer.style.colorOverlay",
+            "gradientOverlay" => "layer.style.gradientOverlay",
+            "stroke" => "layer.style.stroke",
+            _ => continue,
+        };
+        item(ui, label, cmd, json!({}));
+    }
+}
+
 /// The layer context menu's Effects submenu: every effect from the registry grouped by category,
 /// in the same order as the Effect menu's palette, so the two stay in sync automatically.
 fn effects_submenu(ui: &mut egui::Ui, layers: &[u64], item: &mut dyn FnMut(&mut egui::Ui, &str, &str, serde_json::Value)) {
diff --git a/crates/ui-egui/src/panels/viewer.rs b/crates/ui-egui/src/panels/viewer.rs
index 2eee93dd..0175bd6b 100644
--- a/crates/ui-egui/src/panels/viewer.rs
+++ b/crates/ui-egui/src/panels/viewer.rs
@@ -996,7 +996,9 @@ pub fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, rect: Rect) {
         // Layer Handles and Paths.
         let hs = app.session.prefs.general.path_point_size as f32 + 2.0;
         let label_handles = app.session.prefs.appearance.use_label_color_for_handles;
-        for l in comp.layers.iter().filter(|l| selected.contains(&l.id) && l.is_active_at(time)) {
+        // A layer whose Video switch is off has no box, handles or paths in the viewer (a hidden
+        // null disappears from the comp, as in After Effects), even while it is selected.
+        for l in comp.layers.iter().filter(|l| selected.contains(&l.id) && l.is_active_at(time) && l.switches.video) {
             let col = if label_handles { t.label(l.label) } else { t.accent };
             // Motion path of animated position (keyframes and spatial tangents are draggable).
             ov::motion_path(app, &painter, &map, &ectx, l, col, &mut key_hits, &mut motion_frames);
@@ -2228,6 +2230,12 @@ fn pen_press(
             });
             return;
         }
+        // Shift keeps the new segment at a multiple of 45° from the vertex before it (#1544).
+        let last = p.sp.vertices.last().map(|v| p.m.apply(gv2(v[0], v[1])));
+        let c = match last {
+            Some(q) if mods.shift => constrain_45([q.x, q.y], c),
+            _ => c,
+        };
         let lp = inv.apply(gv2(c[0], c[1]));
         let lp = [lp.x, lp.y];
         if let Ok(v) = app.session.execute("mask.addVertex", json!({"layer": lid.0, "mask": uid, "point": lp})) {
@@ -2289,6 +2297,20 @@ fn pen_press(
     });
 }
 
+/// `to` moved onto the nearest line through `from` at a multiple of 45° (horizontal, vertical or
+/// diagonal), as far along it as `to` lies: the Pen's Shift-click.
+fn constrain_45(from: [f64; 2], to: [f64; 2]) -> [f64; 2] {
+    let (dx, dy) = (to[0] - from[0], to[1] - from[1]);
+    if !(dx.is_finite() && dy.is_finite()) || (dx == 0.0 && dy == 0.0) {
+        return to;
+    }
+    let step = std::f64::consts::FRAC_PI_4;
+    let a = (dy.atan2(dx) / step).round() * step;
+    let (ux, uy) = (a.cos(), a.sin());
+    let along = dx * ux + dy * uy;
+    [from[0] + ux * along, from[1] + uy * along]
+}
+
 /// Visible, unlocked layers eligible for viewer hit tests, in front-to-back order.
 /// Solo scope matches the renderer: any soloed AV layer activates it at every time (as in After
 /// Effects), even when hidden, locked or outside its in-out range.
@@ -2692,6 +2714,18 @@ mod tests {
     use super::*;
     use effectcraft_engine::geom::{Mat4, vec3};
 
+    /// #1544: Shift-clicking with the Pen keeps the new segment horizontal, vertical or diagonal.
+    #[test]
+    fn pen_shift_click_keeps_the_segment_at_45_degrees() {
+        let near = |a: [f64; 2], b: [f64; 2]| (a[0] - b[0]).abs() < 1e-9 && (a[1] - b[1]).abs() < 1e-9;
+        let from = [100.0, 100.0];
+        assert!(near(constrain_45(from, [104.0, 180.0]), [100.0, 180.0]), "straight down");
+        assert!(near(constrain_45(from, [30.0, 97.0]), [30.0, 100.0]), "left");
+        assert!(near(constrain_45(from, [150.0, 46.0]), [152.0, 48.0]), "up and right, on the diagonal");
+        assert!(near(constrain_45(from, from), from), "on the vertex");
+        assert!(constrain_45(from, [f64::NAN, 3.0])[0].is_nan(), "a non-finite point stays as it is");
+    }
+
     /// The Rotation tool counts past a full turn in both directions, as in After Effects: the
     /// pointer going round the anchor 1.5 turns clockwise gives 540°, then back 2 turns gives
     /// −180°, with no jump where atan2 wraps from 180° to −180°.
diff --git a/crates/ui-egui/tests/ui_blank_context_menus.rs b/crates/ui-egui/tests/ui_blank_context_menus.rs
index 3c03149a..20f7467c 100644
--- a/crates/ui-egui/tests/ui_blank_context_menus.rs
+++ b/crates/ui-egui/tests/ui_blank_context_menus.rs
@@ -274,6 +274,31 @@ fn timeline_layer_context_menu_has_the_effects_submenu_and_applies_an_effect() {
     assert_eq!(names, ["Gaussian Blur"]);
 }
 
+/// #1611: the layer context menu has Layer Styles between Blending Mode and Effects.
+#[test]
+fn timeline_layer_context_menu_has_layer_styles_submenu() {
+    let mut h = harness();
+    let solid = h.state_mut().session.execute("layer.newSolid", json!({"name": "Solid", "color": "#406080"})).unwrap()["layer"].as_u64().unwrap();
+    h.run_steps(3);
+    let r = rect(&h, &format!("timeline.layer.{solid}.row"));
+    right_click(&mut h, pos2(r.min.x + 210.0, r.center().y));
+    let blending = h.get_by_label("Blending Mode ⏵").rect();
+    let styles = h.get_by_label("Layer Styles ⏵").rect();
+    let effects = h.get_by_label("Effects ⏵").rect();
+    assert!(blending.bottom() <= styles.top() && styles.bottom() <= effects.top(), "Layer Styles between Blending Mode and Effects");
+    h.get_by_label("Layer Styles ⏵").click();
+    h.run_steps(3);
+    assert!(h.query_by_label("Layer Style Options...").is_some());
+    assert!(h.query_by_label("Drop Shadow").is_some());
+    assert!(h.query_by_label("Stroke").is_some());
+    h.get_by_label("Drop Shadow").click();
+    h.run_steps(3);
+    assert_eq!(h.state().dialog, Some(Dialog::LayerStyles));
+    let comp = h.state().session.active_comp().unwrap();
+    let l = comp.layer(effectcraft_engine::project::LayerId(solid)).unwrap();
+    assert!(l.layer_styles().is_some_and(|g| g.sub("dropShadow").is_some()));
+}
+
 /// #976: a layer's context menu has After Effects' Markers ▸ Add Marker, which marks the layer that
 /// was right-clicked (not the one selected before, and not the composition) at the current time.
 #[test]
diff --git a/crates/ui-egui/tests/ui_effect_drop_highlight.rs b/crates/ui-egui/tests/ui_effect_drop_highlight.rs
new file mode 100644
index 00000000..6c0ede47
--- /dev/null
+++ b/crates/ui-egui/tests/ui_effect_drop_highlight.rs
@@ -0,0 +1,40 @@
+//! Dragging an effect over the Timeline lights up the layer it would land on, not the whole panel.
+use effectcraft_engine::Session;
+use effectcraft_ui_egui::{EffectcraftApp, panels::DragPayload};
+use egui::{Event, Modifiers, PointerButton, Pos2, Rect, pos2, vec2};
+use egui_kittest::Harness;
+use serde_json::json;
+
+fn rect(h: &Harness<'_, EffectcraftApp>, id: &str) -> Rect {
+    let e = h.state().auto.find(id).unwrap_or_else(|| panic!("missing {id}"));
+    Rect::from_min_size(pos2(e.rect[0], e.rect[1]), vec2(e.rect[2], e.rect[3]))
+}
+
+fn drag_to(h: &mut Harness<'_, EffectcraftApp>, p: Pos2) {
+    h.input_mut().events.push(Event::PointerMoved(p));
+    h.input_mut().events.push(Event::PointerButton { pos: p, button: PointerButton::Primary, pressed: true, modifiers: Modifiers::NONE });
+    egui::DragAndDrop::set_payload(&h.ctx, DragPayload::Effect("CC Bend It".into()));
+    h.run_steps(2);
+}
+
+#[test]
+fn effect_drag_highlights_the_layer_under_the_pointer() {
+    let mut s = Session::default();
+    s.execute("comp.new", json!({"name": "Main", "width": 640, "height": 360, "duration": 4})).unwrap();
+    let a = s.execute("layer.newNull", json!({})).unwrap()["layer"].as_u64().unwrap();
+    let b = s.execute("layer.newNull", json!({})).unwrap()["layer"].as_u64().unwrap();
+    let mut h = Harness::builder().with_size(vec2(1600.0, 1000.0)).build_eframe(|_| EffectcraftApp::new(s));
+    h.run_steps(3);
+    assert!(h.state().auto.find("timeline.dropTarget").is_none(), "nothing is lit without a drag");
+    let (row_a, row_b) = (rect(&h, &format!("timeline.layer.{a}.row")), rect(&h, &format!("timeline.layer.{b}.row")));
+    let panel = rect(&h, "timeline.layerMarquee");
+
+    drag_to(&mut h, row_b.center());
+    let lit = rect(&h, "timeline.dropTarget");
+    assert!(lit.contains(row_b.center()) && !lit.contains(row_a.center()), "lit {lit:?} for row {row_b:?}");
+    assert!(lit.height() < panel.height(), "only the layer is lit, not the whole timeline");
+
+    drag_to(&mut h, row_a.center());
+    let lit = rect(&h, "timeline.dropTarget");
+    assert!(lit.contains(row_a.center()) && !lit.contains(row_b.center()), "the highlight follows the pointer: {lit:?}");
+}
diff --git a/crates/ui-egui/tests/ui_keyframes.rs b/crates/ui-egui/tests/ui_keyframes.rs
index 6167fbf8..b47963d8 100644
--- a/crates/ui-egui/tests/ui_keyframes.rs
+++ b/crates/ui-egui/tests/ui_keyframes.rs
@@ -562,3 +562,39 @@ fn speed_graph_handle_drags_upward_past_the_top() {
     // The speed per pixel depends on the graph's fitted scale; only the proportion matters.
     assert!(short > 0.0 && long > 9.0 * short, "40 px up gave {short}, 400 px up gave {long}");
 }
+
+/// #1617: with Easy Ease both keys sit at speed 0 in the speed graph, so fitting the selection to
+/// its keys and handles framed -1..1 while the curve between them peaks far above. Opening the
+/// Graph Editor on selected keys and Fit Selection both frame the curve's peak, and a lone
+/// selected key frames its neighbouring segments.
+#[test]
+fn speed_graph_fit_selection_frames_the_curve_between_the_keys() {
+    let (mut h, id, uid) = harness();
+    let s = &mut h.state_mut().session;
+    s.execute("prop.select", json!({"layer": id.0, "prop": uid})).unwrap();
+    s.execute("keys.selectAll", json!({})).unwrap();
+    s.execute("keys.easyEase", json!({})).unwrap();
+    let keys = h.state().session.active_comp().unwrap().layer(id).unwrap().props.prop("transform/opacity").unwrap().keys.clone();
+    let peak = (0..=100)
+        .map(|i| effectcraft_engine::keyframe::velocity(&keys, effectcraft_engine::time::Tick::from_seconds_f64(i as f64 / 100.0), false)[0].abs())
+        .fold(0.0, f64::max);
+    assert!(peak > 100.0, "the eased curve peaks above its average speed: {peak}");
+    h.state_mut().ui.timeline.graph_mode = "speed".into();
+    h.state_mut().ui.timeline.graph_editor = true;
+    h.run_steps(4);
+    let frames_peak = |h: &Harness<'_, EffectcraftApp>, what: &str| {
+        let (lo, hi) = h.state().ui.timeline.graph_range.expect("a fitted range");
+        assert!(lo <= 0.0 && hi > peak * 0.9, "{what}: range {lo}..{hi}, the curve peaks at {peak}");
+    };
+    frames_peak(&h, "on open");
+    h.state_mut().ui.timeline.graph_range = Some((-1.0, 1.0));
+    let fit = h.state().auto.find("timeline.graph.fitSelection").expect("the Fit Selection button").rect;
+    click_with(&mut h, pos2(fit[0] + fit[2] / 2.0, fit[1] + fit[3] / 2.0), Default::default());
+    frames_peak(&h, "Fit Selection");
+    let last = keys[1].time.seconds();
+    h.state_mut().session.execute("keys.select", json!({"keys": [{"layer": id.0, "prop": uid, "time": last}]})).unwrap();
+    assert_eq!(h.state().session.state.selected_keys.len(), 1);
+    h.state_mut().ui.timeline.graph_range = Some((-1.0, 1.0));
+    click_with(&mut h, pos2(fit[0] + fit[2] / 2.0, fit[1] + fit[3] / 2.0), Default::default());
+    frames_peak(&h, "lone key");
+}
diff --git a/crates/ui-egui/tests/ui_panels.rs b/crates/ui-egui/tests/ui_panels.rs
index 0c54445b..240f2de8 100644
--- a/crates/ui-egui/tests/ui_panels.rs
+++ b/crates/ui-egui/tests/ui_panels.rs
@@ -67,6 +67,26 @@ fn window_menu_opens_the_new_panels() {
     }
 }
 
+/// #1630: choosing a checked panel in the Window menu closes it, as in After Effects (it only
+/// brought the panel to the front, so the check mark never went away); choosing it again opens it.
+#[test]
+fn window_menu_closes_a_checked_panel() {
+    let mut h = harness();
+    let shown = |h: &Harness<'_, EffectcraftApp>| {
+        h.state().ui.dock.contains(PanelKind::Align) || h.state().ui.floating.iter().any(|f| f.panels.contains(&PanelKind::Align))
+    };
+    open(&mut h, "align");
+    assert!(shown(&h));
+    click(&mut h, "menu.Window");
+    let at = h.query_by_label("✔ Align").expect("Window ▸ Align, checked").rect().center();
+    click_at(&mut h, at);
+    assert!(!shown(&h), "Align closed");
+    click(&mut h, "menu.Window");
+    let at = h.query_by_label(" Align").expect("Window ▸ Align, unchecked").rect().center();
+    click_at(&mut h, at);
+    assert!(shown(&h), "Align open again");
+}
+
 #[test]
 fn scopes_switch_kind() {
     let mut h = harness();
diff --git a/crates/ui-egui/tests/ui_timeline_effect_label.rs b/crates/ui-egui/tests/ui_timeline_effect_label.rs
new file mode 100644
index 00000000..deeee9e5
--- /dev/null
+++ b/crates/ui-egui/tests/ui_timeline_effect_label.rs
@@ -0,0 +1,45 @@
+//! An effect's colour label (26.5) shows on its Timeline row as well as in Effect Controls.
+
+use effectcraft_engine::Session;
+use effectcraft_engine::project::LayerId;
+use effectcraft_ui_egui::EffectcraftApp;
+use effectcraft_ui_egui::dock::PanelKind;
+use egui::vec2;
+use egui_kittest::Harness;
+use serde_json::json;
+
+fn harness() -> (Harness<'static, EffectcraftApp>, u64, u64) {
+    let mut s = Session::default();
+    s.execute("comp.new", json!({"name": "Main", "width": 320, "height": 180, "frameRate": 30, "duration": 4})).unwrap();
+    let layer = s.execute("layer.newSolid", json!({"name": "A", "color": "#406080"})).unwrap()["layer"].as_u64().unwrap();
+    let fx = s.execute("effect.apply", json!({"layers": [layer], "effect": "ec.blur.gaussian"})).unwrap()["effects"][0].as_u64().unwrap();
+    s.state.selected_layers = vec![LayerId(layer)];
+    s.state.selected_props = vec![(LayerId(layer), fx)];
+    let mut app = EffectcraftApp::new(s);
+    app.show_panel(PanelKind::Timeline);
+    app.ui.timeline.open_layers.insert(layer);
+    let effects = app.session.active_comp().and_then(|c| c.layer(LayerId(layer))).and_then(|l| l.props.sub("effects")).map(|g| g.uid);
+    app.ui.timeline.open_groups.extend(effects);
+    let mut h = Harness::builder().with_size(vec2(1600.0, 1000.0)).build_eframe(|_| app);
+    h.run_steps(4);
+    (h, layer, fx)
+}
+
+/// The label bar appears on the effect's row once the effect has a label, carries the label's
+/// name for agents, and goes away when the label is cleared.
+#[test]
+fn the_effect_row_wears_its_colour_label() {
+    let (mut h, layer, fx) = harness();
+    let id = format!("timeline.group.{fx}.label");
+    assert!(h.state().auto.find(&format!("timeline.group.{fx}.fx")).is_some(), "the effect's row is on screen");
+    assert!(h.state().auto.find(&id).is_none(), "an unlabelled effect has no bar");
+
+    h.state_mut().session.execute("effect.setLabel", json!({"layer": layer, "effect": fx, "label": "Blue"})).unwrap();
+    h.run_steps(3);
+    let blue = h.state().session.prefs.label_name(effectcraft_engine::color::Label::Blue);
+    assert_eq!(h.state().auto.find(&id).map(|e| e.label.clone()), Some(blue));
+
+    h.state_mut().session.execute("effect.setLabel", json!({"layer": layer, "effect": fx, "label": 0})).unwrap();
+    h.run_steps(3);
+    assert!(h.state().auto.find(&id).is_none(), "clearing the label removes the bar");
+}
diff --git a/crates/ui-egui/tests/ui_viewer.rs b/crates/ui-egui/tests/ui_viewer.rs
index 53d6d206..47bb475c 100644
--- a/crates/ui-egui/tests/ui_viewer.rs
+++ b/crates/ui-egui/tests/ui_viewer.rs
@@ -763,6 +763,40 @@ fn mask_path(h: &Harness<'_, EffectcraftApp>, name: &str) -> effectcraft_engine:
     l.masks().unwrap().groups().next().unwrap().get("path").unwrap().value.as_path().unwrap().clone()
 }
 
+/// #1544: a Shift-click with the Pen puts the next point straight below, beside or diagonal to the
+/// one before it; without Shift it goes where it was clicked.
+#[test]
+fn pen_shift_click_draws_a_straight_segment() {
+    let mut h = harness();
+    let plate = layer_id(&h, "Plate");
+    h.state_mut().session.execute("layer.select", json!({"layers": [plate]})).unwrap();
+    h.state_mut().session.execute("view.snapping", json!({"value": false})).unwrap();
+    h.state_mut().ui.tool = Tool::Pen;
+    h.run_steps(2);
+    let first = screen(&h, [100.0, 60.0]);
+    click(&mut h, first);
+    let shift_click = |h: &mut Harness<'_, EffectcraftApp>, p: Pos2| {
+        let shift = egui::Modifiers::SHIFT;
+        h.input_mut().events.push(Event::ModifiersChanged(shift));
+        h.input_mut().events.push(Event::PointerMoved(p));
+        h.step();
+        h.input_mut().events.push(Event::PointerButton { pos: p, button: egui::PointerButton::Primary, pressed: true, modifiers: shift });
+        h.step();
+        h.input_mut().events.push(Event::PointerButton { pos: p, button: egui::PointerButton::Primary, pressed: false, modifiers: shift });
+        h.input_mut().events.push(Event::ModifiersChanged(egui::Modifiers::NONE));
+        h.run_steps(2);
+    };
+    let down = screen(&h, [112.0, 250.0]);
+    shift_click(&mut h, down);
+    let free = screen(&h, [300.0, 290.0]);
+    click(&mut h, free);
+    let drawn = mask_path(&h, "Plate");
+    let near = |a: [f64; 2], b: [f64; 2]| (a[0] - b[0]).abs() < 1.0 && (a[1] - b[1]).abs() < 1.0;
+    assert_eq!(drawn.vertices.len(), 3, "{drawn:?}");
+    assert!(near(drawn.vertices[1], [100.0, 250.0]), "straight down: {drawn:?}");
+    assert!(near(drawn.vertices[2], [300.0, 290.0]), "no Shift, no constraint: {drawn:?}");
+}
+
 /// Drawing a mask with the Pen, moving a point and undoing take one action back per undo; a
 /// double-click on a point selects all of them in a free-transform box, and dragging inside it
 /// (or, once the box is gone, dragging a point) moves the whole mask (#290).
@@ -2272,3 +2306,41 @@ fn mask_marquee_selects_vertices() {
     let sel = &h.state().session.state.selected_vertices;
     assert_eq!(sel.len(), 2, "shift-marquee adds: {sel:?}");
 }
+
+/// A null's eye in the Timeline hides it in the Composition viewer, as in After Effects: its box
+/// and handles go even while it is selected and a click on its box doesn't pick it; the eye back
+/// on brings them back.
+#[test]
+fn null_eye_hides_it_in_the_viewer() {
+    let mut s = Session::default();
+    s.execute("comp.new", json!({"name": "Nulls", "width": 640, "height": 360, "duration": 4})).unwrap();
+    let n = s.execute("layer.newNull", json!({})).unwrap()["layer"].as_u64().unwrap();
+    s.execute("layer.select", json!({"layers": [n]})).unwrap();
+    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).build_eframe(move |_| EffectcraftApp::new(s));
+    h.run_steps(3);
+    let handle = format!("viewer.handle.{n}.0");
+    let eye = format!("timeline.layer.{n}.video");
+    assert!(h.state().auto.find(&handle).is_some(), "a shown null has handles");
+    // The eye is there for a null and turns its video off.
+    let at = rect(&h, &eye).center();
+    click(&mut h, at);
+    assert!(!h.state().session.active_comp().unwrap().layer(LayerId(n)).unwrap().switches.video);
+    h.run_steps(2);
+    assert!(h.state().auto.find(&handle).is_none(), "a hidden null has no handles");
+    // A click on its box doesn't pick it.
+    h.state_mut().session.execute("edit.deselectAll", json!({})).unwrap();
+    h.run_steps(40); // A new click, not a double-click.
+    let centre = screen(&h, [320.0, 180.0]);
+    click(&mut h, centre);
+    assert!(h.state().session.state.selected_layers.is_empty());
+    // The eye back on: selectable again, with its handles.
+    h.run_steps(40);
+    let at = rect(&h, &eye).center();
+    click(&mut h, at);
+    assert!(h.state().session.active_comp().unwrap().layer(LayerId(n)).unwrap().switches.video);
+    h.run_steps(40);
+    click(&mut h, centre);
+    assert_eq!(h.state().session.state.selected_layers, vec![LayerId(n)]);
+    h.run_steps(2);
+    assert!(h.state().auto.find(&handle).is_some(), "handles back with the eye on");
+}
diff --git a/docs/gaps.md b/docs/gaps.md
index 64f6f413..a20e779c 100644
--- a/docs/gaps.md
+++ b/docs/gaps.md
@@ -77,7 +77,7 @@ are grouped by area; the issue tracker has the rest.
 | 18 | **Relative paths and relinking** | Projects store absolute footage paths; no relink when a project moves | Moving or sharing a project breaks it | 6–12 h | G4 · [file-format-parity.md](file-format-parity.md) |
 | 19 | **Plug-in ecosystem** | No After Effects SDK hosting (#600, #327 OpenFX, #334, #376 plug-in manager); our WebAssembly API has no third-party plug-ins | Many pro projects depend on Trapcode, Element, Saber… | 40–80 h for API growth; SDK hosting needs an owner decision | G8 · [scripting-parity.md](scripting-parity.md) |
 | 20 | **Multi-monitor and video output** | #486: any panel can move into a native window of its own (panel menu ▸ Move Panel to New Window, `window.panelWindow`) and so onto another screen, restored with the workspace; still missing: dragging tabs between those windows, app shortcuts while one has the focus, named workspaces remembering them, Mercury Transmit to video hardware (we have a second preview window only) | Two-screen setups are standard for professionals | 10–20 h | G2 · [hardware-parity.md](hardware-parity.md) |
-| 21 | **Small 26.x features** | Proportional Scrubbing (26.2), pasting Illustrator's own clipboard data as shapes (26.3; SVG markup on the clipboard pastes as a shape layer, #738), variable-font filter (26.3), the rebuilt Effect Controls (26.5). Percentage guides (View ▸ Add Percentage Guide, Convert Guides to Percentage / Pixels) and effect colour labels (Effect Controls header bar and right-click Label menu, `effect.setLabel`) are in (#1095), built from the release notes' one-line descriptions and never compared with After Effects: the Timeline shows no effect label, and the labels' exact UI there is unknown | Users of the current version expect them | 10–20 h left | — · [ui-parity.md](ui-parity.md) |
+| 21 | **Small 26.x features** | Proportional Scrubbing (26.2), pasting Illustrator's own clipboard data as shapes (26.3; SVG markup on the clipboard pastes as a shape layer, #738), variable-font filter (26.3), the rebuilt Effect Controls (26.5). Percentage guides (View ▸ Add Percentage Guide, Convert Guides to Percentage / Pixels) and effect colour labels (Effect Controls header bar and right-click Label menu, `effect.setLabel`) are in (#1095), built from the release notes' one-line descriptions and never compared with After Effects: the Timeline's effect rows wear the label as a colour bar on the left edge (#1509), but After Effects' exact UI there is unknown | Users of the current version expect them | 10–20 h left | — · [ui-parity.md](ui-parity.md) |
 | 22 | **Encoder efficiency** | HEVC / AV1 have no B-frames, multi-reference or SAO / CDEF; Opus no FEC / DTX; single-file intermediates are 8-bit uncompressed QuickTime only (#372 closed by #778: no 16-bpc, AVI or lossless-compressed codec); #325 render over existing file | Larger files than After Effects + Media Encoder | 20–40 h | G6 · [file-format-parity.md](file-format-parity.md) |
 | 23 | **Essential Graphics interchange** | Templates are `.ectemplate`, not `.mogrt`; #338 and #611 closed | Premiere editors can't use our templates | 15–30 h | — · [file-format-parity.md](file-format-parity.md) |
 | 24 | **Timeline depth requests** | #601 expand precomps in place, #602 reorderable render stack, #604 guide-only effects, #425 keyframe confusion (#355 and #428 closed) | Power-user speed | 15–30 h | G2 · [ui-parity.md](ui-parity.md) |
diff --git a/docs/ui-parity.md b/docs/ui-parity.md
index 22da668d..5173e769 100644
--- a/docs/ui-parity.md
+++ b/docs/ui-parity.md
@@ -17,13 +17,13 @@ feel and platform differences, and the 26.x interface changes are not in yet.
 |---|---|---:|---|
 | Menu bar | After Effects' menus, order, submenus and labels; native on macOS; keyboard-operable in-window bar | 95% | 587 entries in `crates/engine/src/menus.rs`; Adobe-service entries omitted by design; `ui_menus` tests (#279) |
 | Panels and workspaces | Every After Effects panel; all standard workspaces; drag-to-dock, tabs, floating panels, maximise | 75% | `ui_tabs`, `ui_panels`; panels move into their own native windows on any screen (#486 open: no dragging tabs between those windows); #302, #301 and #320 (docking, stacked-panel headers, workspace persistence) are closed |
-| Timeline | Switches, modes, parent & link, twirl-downs, reveal shortcuts (U, UU, P, S, R, T, A, E, M, F, Alt+Shift…), pick whips, graph editor, work area, markers | 75% | `ui_keyframes`, `ui_timeline_*`; expand precomps in place (#601); #456, #457, #569 and #355 (Graph Editor jitter and buttons, negative rotation, bulk keyframing) are closed; Proportional Scrubbing (26.2: Ctrl+Alt / Cmd+Opt scrub of hot text spreads the change over the selected layers by selection order, #770) matched for layers selected as a whole, not yet for individually selected properties |
+| Timeline | Switches, modes, parent & link, twirl-downs, reveal shortcuts (U, UU, P, S, R, T, A, E, M, F, Alt+Shift…), pick whips, graph editor, work area, markers | 75% | `ui_keyframes`, `ui_timeline_*`; expand precomps in place (#601); #456, #457, #569 and #355 (Graph Editor jitter and buttons, negative rotation, bulk keyframing) are closed; Proportional Scrubbing (26.2: Ctrl+Alt / Cmd+Opt scrub of hot text spreads the change over the selected layers by selection order, #770) matched for layers selected as a whole, not yet for individually selected properties; every layer has the Video switch, nulls, cameras and lights included (a null with its eye off has no box or handles in the viewer and isn't picked there) |
 | Composition viewer | Selection, handles with direction-aware cursors, rulers, guides, grids, snapping, channels, exposure, region of interest, snapshots, 3D views, Spacebar hand | 70% | `ui_viewer`, `ui_viewers`; Cmd/Ctrl +/− doesn't zoom (#570); anchor point grab on Linux (#492); #352 (snapping) is closed; no 3D transform gizmos (#392, #347); percentage guides (26.5) exist as View ▸ Add Percentage Guide and Convert Guides to Percentage / Pixels (a guide stores a percent of the comp, so it follows comp-size changes; behaviour inferred from the release note, not compared with After Effects); Copy Frame to Clipboard (26.3) is in the Composition menu and the viewer's context menu |
 | Tools panel | All After Effects tools; long-press flyouts; Tool Creates Shape / Mask; Fill / Stroke options | 80% | #213, #227 fixed; #553 (pen and vertex tools on motion paths) is closed |
 | Nudging and modifiers | Arrow nudge (1 px, Shift 10 px), Alt/Option duplicates and slips, Shift constrains | 75% | #290 nudging fixed; #491 (Linux multi-layer edits) is closed |
 | Numeric entry | Scrubbable values, typed entry with Tab / Shift+Tab, angle revolutions, Escape cancels, non-finite rejected | 85% | `ui_angles`, `ui_inline_edit` (#93, #141, #361); rename arrows on Linux (#488) |
-| Effect Controls | After Effects' twirl-downs, angle dial, point crosshair, eyedropper, curves/levels editors, effect menu on right-click | 70% | `ui_effect_controls`, `ui_fx_editors`; 26.5 rebuilt this panel with icon controls and effect colour labels: labels exist (a colour bar on the effect header, right-click Label menu, `effect.setLabel`; not in the Timeline), the rebuilt controls are not matched |
-| Context menus | Layer, property, Project, Timeline empty area, work area, labels with colours | 80% | `ui_blank_context_menus`, `ui_project_rows`; #227, #290, #407 fixed; a comp's Project row menu has Composition Settings… (#1058) |
+| Effect Controls | After Effects' twirl-downs, angle dial, point crosshair, eyedropper, curves/levels editors, effect menu on right-click | 70% | `ui_effect_controls`, `ui_fx_editors`; 26.5 rebuilt this panel with icon controls and effect colour labels: labels exist (a colour bar on the effect header and on the effect's Timeline row, right-click Label menu, `effect.setLabel`), the rebuilt controls are not matched |
+| Context menus | Layer, property, Project, Timeline empty area, work area, labels with colours | 80% | `ui_blank_context_menus`, `ui_project_rows`; #227, #290, #407 fixed; a comp's Project row menu has Composition Settings… (#1058); layer context menu has Layer Styles (#1611) |
 | Keyboard shortcuts | After Effects' defaults; Keyboard Shortcuts editor that rebinds and saves sets | 75% | Shortcut editor in Settings; #467 (adding shortcuts on Linux), #428 and #336 are closed; no shortcuts for scripts |
 | Drag and drop | Project → Timeline / viewer / New Comp / Render Queue; effects onto layers; files from the OS | 65% | `ui_drag_drop`; OS drops fail on Wayland (winit) and some Linux setups (#268); #552, #351 (multi-file drops) and #511 (crash dragging over the import dialog) are closed |
 | Text editing on canvas | Point and paragraph text, per-character styles, Character / Paragraph panels, OpenType and variable axes | 70% | `ui_text_edit`, `ui_font_search`; paragraph alignment inverted (#316); toolbar font options (#550); font search by typing (#583) is closed; the font menus' variable-font filter (26.3) landed (#741) |
diff --git a/docs/web.md b/docs/web.md
index e73f7a89..23ee1da1 100644
--- a/docs/web.md
+++ b/docs/web.md
@@ -413,7 +413,8 @@ no npm packages): load, the GPU path (WebGPU → GPU compositor, viewer on the G
 in the viewer, `render.frame`, Render Queue GIF and PNG sequence (`.zip`) downloads, a background
 render in a worker while measuring the page's event-loop gaps (must stay under 400 ms) and its
 progress, the AudioContext starting on a (simulated) key press and a tone playing through it
-with the meters moving, Save As and re-opening the saved project, persistence across a reload
+with the meters moving, Save As and re-opening the saved project, a script opening a file from
+browser storage and the footage check finding stored media, persistence across a reload
 (session snapshot, a stored project, imported media, a setting, Open Recent) and an offline
 reload through the service worker. It writes screenshots and `report.json`: