From 22ddf7bb99ed79333d14962b31a32fd9b9576af0 Mon Sep 17 00:00:00 2001
From: tylerjenningsw <tylerjennings2@outlook.com>
Date: Tue, 20 Oct 2026 08:51:09 -0400
Subject: [PATCH] Clipboard: keyframe text for a 2D layer writes the Z it shows
 (#1908)

---
 crates/engine/src/keyframe_text.rs       |  8 +++++++-
 crates/engine/src/tests_keyframe_text.rs | 20 ++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/crates/engine/src/keyframe_text.rs b/crates/engine/src/keyframe_text.rs
index 793d0cfb8..59e5402b7 100644
--- a/crates/engine/src/keyframe_text.rs
+++ b/crates/engine/src/keyframe_text.rs
@@ -56,7 +56,13 @@ pub(crate) fn text(project: &Project, comp: &Comp, keys: &[KeyRef], statics: &[(
             _ => ["X", "Y", "Z"].iter().take(dims).map(|axis| format!("{axis} {unit}")).collect(),
         };
         blocks.push_str(&format!("Transform\t{}\n\tFrame\t{}\n", pr.name, columns.join("\t")));
-        for (frame, values) in rows {
+        for (frame, mut values) in rows {
+            // A 2D layer ignores the Z it may keep (from pasted 3D keys): write the one it shows.
+            if !layer.is_3d()
+                && let Some(z) = values.get_mut(2)
+            {
+                *z = if *id == "scale" { 100.0 } else { 0.0 };
+            }
             let values: Vec<String> = values.into_iter().map(num).collect();
             blocks.push_str(&format!("\t{frame}\t{}\n", values.join("\t")));
         }
diff --git a/crates/engine/src/tests_keyframe_text.rs b/crates/engine/src/tests_keyframe_text.rs
index 81ca97bd4..8ff9f9c20 100644
--- a/crates/engine/src/tests_keyframe_text.rs
+++ b/crates/engine/src/tests_keyframe_text.rs
@@ -138,6 +138,26 @@ fn properties_the_layer_does_not_use_are_left_out() {
     assert!(names(&text).contains(&"Point of Interest"), "{text}");
 }
 
+#[test]
+fn a_2d_layer_writes_the_z_it_shows() {
+    // Keys pasted from a 3D layer keep their Z on a 2D one, which ignores it.
+    let (mut s, l) = session();
+    let src = LayerId(s.execute("layer.newSolid", json!({"color": "#00ff00", "width": 200, "height": 100})).unwrap()["layer"].as_u64().unwrap());
+    edit_layer(&mut s, src, |l| l.switches.three_d = true);
+    add_key(&mut s, src, "transform/position", Tick::ZERO, json!([100, 200, 300]));
+    add_key(&mut s, src, "transform/scale", Tick::ZERO, json!([50, 60, 70]));
+    s.state.selected_keys = ["transform/position", "transform/scale"].map(|p| KeyRef { layer: src, prop: uid(&s, src, p), time: Tick::ZERO }).to_vec();
+    s.execute("keys.copy", json!({})).unwrap();
+    s.execute("keys.paste", json!({"layers": [l.0], "time": 0})).unwrap();
+    let pasted = s.active_comp().unwrap().layer(l).unwrap().props.prop("transform/position").unwrap().keys[0].value.components();
+    assert_eq!(pasted, [100.0, 200.0, 300.0], "the 2D layer keeps the pasted Z");
+    s.state.selected_keys = ["transform/position", "transform/scale"].map(|p| KeyRef { layer: l, prop: uid(&s, l, p), time: Tick::ZERO }).to_vec();
+    s.execute("keys.copy", json!({})).unwrap();
+    let text = s.state.keyframe_text.clone().unwrap();
+    assert!(text.contains("Transform\tPosition\n\tFrame\tX pixels\tY pixels\tZ pixels\n\t0\t100\t200\t0\n"), "{text}");
+    assert!(text.contains("Transform\tScale\n\tFrame\tX percent\tY percent\tZ percent\n\t0\t50\t60\t100\n"), "{text}");
+}
+
 #[test]
 fn keys_from_two_layers_have_no_text() {
     let (mut s, a) = session();