diff --git a/crates/pipeline/src/lib.rs b/crates/pipeline/src/lib.rs
index f7c33ee9e..05f0ff8a5 100644
--- a/crates/pipeline/src/lib.rs
+++ b/crates/pipeline/src/lib.rs
@@ -358,6 +358,9 @@ pub struct Plan<'a> {
     pub geo: u64,
     /// Key of the white-balanced, retouched, denoised image (and of the planes computed from it).
     pub lin_key: u64,
+    /// [`Self::lin_key`] without the noise-reduction settings: draft renders reuse the smooth
+    /// planes of an image that differs from this one only in its noise reduction.
+    pub pre_nr_key: u64,
     /// Red eye / pet eye corrections with their detected pupils, in output pixels.
     pub eyes: Vec<redeye::EyeK>,
     /// The whole frame's dehaze airlight, for a windowed render (which can't see the whole frame).
@@ -418,7 +421,7 @@ pub fn plan<'a>(src: &Rgb32f, info: &SourceInfo, s: &'a DevelopSettings, req: &R
     let (wb_t, wb_tint) = local::effective_wb(info, s);
     let eyes = redeye::resolve(src, &s.red_eye, s.orientation, &frame, w, h, px_per_long);
     let d = &s.detail;
-    let lin_key = hash_of((
+    let pre_nr_key = hash_of((
         geo,
         [wb_t, wb_tint, info.as_shot_temp, info.as_shot_tint].map(f64::to_bits),
         format!("{:?}", s.spots),
@@ -427,10 +430,10 @@ pub fn plan<'a>(src: &Rgb32f, info: &SourceInfo, s: &'a DevelopSettings, req: &R
         format!("{:?}", s.optics),
         // and the local tone mapping
         local_tone::enabled(info, s),
-        [d.nr_luminance, d.nr_detail, d.nr_color, d.nr_color_detail, d.nr_color_smoothness].map(f64::to_bits),
         src_long,
     ));
-    Plan { settings, frame, w, h, px_per_long, src_long, geo, lin_key, eyes, fixed_air, keep, mattes: info.mattes.clone() }
+    let lin_key = hash_of((pre_nr_key, [d.nr_luminance, d.nr_detail, d.nr_color, d.nr_color_detail, d.nr_color_smoothness].map(f64::to_bits)));
+    Plan { settings, frame, w, h, px_per_long, src_long, geo, lin_key, pre_nr_key, eyes, fixed_air, keep, mattes: info.mattes.clone() }
 }
 
 /// Whether the scene-linear stage needs work only the CPU does (defringe, spot removal).
@@ -521,7 +524,12 @@ fn render_impl(src: Src<'_>, info: &SourceInfo, s: &DevelopSettings, req: &Rende
     lap("wb/spots/nr", &mut t);
     let mut planes = match cached.map(|e| e.planes) {
         Some(p) if p.key == lin_key => p,
-        _ => local::Planes { key: lin_key, ..Default::default() },
+        // A draft while noise reduction changes (a slider drag): the wide, edge-aware planes of the
+        // image before the change stand in (noise reduction barely moves a blur that wide); the
+        // per-pixel log luminance and the fine texture band are redone. Keyed so a full-quality
+        // render never takes them.
+        Some(p) if req.quality == Quality::Draft && p.pre_nr == plan.pre_nr_key => p.for_other_nr(),
+        _ => local::Planes { key: lin_key, pre_nr: plan.pre_nr_key, ..Default::default() },
     };
     let mut prep = local::prepare(lin.clone(), s, frame, px_per_long, req.quality, &mut planes, plan.mattes.as_deref());
     if let Some(a) = plan.fixed_air {
diff --git a/crates/pipeline/src/local.rs b/crates/pipeline/src/local.rs
index fd7fefd34..c74d992f1 100644
--- a/crates/pipeline/src/local.rs
+++ b/crates/pipeline/src/local.rs
@@ -210,6 +210,8 @@ pub fn log_lum(c: [f32; 3]) -> f32 {
 #[derive(Clone, Default)]
 pub(crate) struct Planes {
     pub key: u64,
+    /// The image's key without its noise reduction (`Plan::pre_nr_key`).
+    pub pre_nr: u64,
     pub log_l: Option<Arc<Plane>>,
     pub base: Option<(u32, Arc<Plane>)>,
     pub clarity: Option<(u32, Arc<Plane>)>,
@@ -220,6 +222,15 @@ pub(crate) struct Planes {
     pub chroma: Option<(u32, Arc<Rgb32f>)>,
 }
 
+impl Planes {
+    /// The planes that still fit an image differing from this one only in noise reduction, close
+    /// enough for a draft: the wide blurs (base, clarity, dehaze, chromaticity). Its `key` matches
+    /// no image, so only another draft takes them.
+    pub fn for_other_nr(self) -> Planes {
+        Planes { key: 0, pre_nr: self.pre_nr, log_l: None, texture: None, ..self }
+    }
+}
+
 /// Reuse `slot` if it was computed at `sigma`, else compute and store it.
 fn plane_at(slot: &mut Option<(u32, Arc<Plane>)>, sigma: f32, f: impl FnOnce() -> Plane) -> Arc<Plane> {
     match slot {
diff --git a/crates/pipeline/src/tests.rs b/crates/pipeline/src/tests.rs
index 185d96b31..54a75ff8d 100644
--- a/crates/pipeline/src/tests.rs
+++ b/crates/pipeline/src/tests.rs
@@ -206,7 +206,13 @@ fn stage_cache_matches_uncached_render_through_a_slider_session() {
         for req in [&full, &draft] {
             let a = render_cached(&src, &info, &s, req, &cache).image;
             let b = render(&src, &info, &s, req).image;
-            assert_eq!(a, b, "step {i} {:?}", req.quality);
+            if req.quality == Quality::Draft && i == 6 {
+                // a draft while noise reduction changes keeps the wide planes of the image before it
+                let d = max_diff(&a, &b);
+                assert!(d <= 3, "step {i} draft: {d}");
+            } else {
+                assert_eq!(a, b, "step {i} {:?}", req.quality);
+            }
         }
     }
     assert_eq!(cache.len(), 2);
@@ -220,6 +226,35 @@ fn stage_cache_matches_uncached_render_through_a_slider_session() {
     assert_eq!(render_cached(&other, &info, &s, &full, &cache).image, render(&other, &info, &s, &full).image);
 }
 
+#[test]
+fn drafts_keep_wide_planes_across_a_noise_reduction_change_and_full_renders_do_not() {
+    use crate::{Quality, StageCache, render_cached};
+    use std::sync::Arc;
+    let src = Arc::new(scene());
+    let info = SourceInfo { raw: true, ..Default::default() };
+    let cache = StageCache::default();
+    let draft = RenderRequest { quality: Quality::Draft, ..RenderRequest::fit(160, 160) };
+    let full = RenderRequest { quality: Quality::Full, ..draft };
+    let mut s = typical_edits();
+    s.effects.clarity = 60.0;
+    render_cached(&src, &info, &s, &draft, &cache);
+    let clarity_plane = |c: &StageCache| c.entries.lock().unwrap().first().and_then(|e| e.planes.clarity.clone()).unwrap().1;
+    let first = clarity_plane(&cache);
+    s.detail.nr_luminance = 50.0;
+    render_cached(&src, &info, &s, &draft, &cache);
+    assert!(Arc::ptr_eq(&first, &clarity_plane(&cache)), "a draft redid the clarity plane for a noise-reduction change");
+    for v in [10.0, 45.0, 80.0] {
+        s.detail.nr_luminance = v;
+        s.detail.nr_color = v / 2.0;
+        let a = render_cached(&src, &info, &s, &draft, &cache).image;
+        let d = max_diff(&a, &render(&src, &info, &s, &draft).image);
+        // close to the exact draft (a few levels at edges, where clarity is strong)
+        assert!(d <= 8, "nr {v}: {d}");
+        // a full-quality render after the drafts is exact (it never takes the stand-in planes)
+        assert_eq!(render_cached(&src, &info, &s, &full, &cache).image, render(&src, &info, &s, &full).image, "nr {v}");
+    }
+}
+
 #[test]
 fn exposure_after_spatial_filters_equals_exposing_the_source() {
     // The pipeline filters the image before exposure and applies exposure per pixel; filters on