effects: Write-on and Stroke Brush Size goes up to 200 px (#2980) (#3021)

After Effects 2026 accepts 0 to 200 for Brush Size of both effects (a
script setting 201 is refused with "out of range 0 to 200"); the range
here ended at 50. The slider keeps its 0 to 50 travel; larger values are
typed.

Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>

crates/effects/src/generate3/registry.rs

@@ -83,7 +83,7 @@ pub fn specs() -> Vec<EffectSpec> {
                 check("allMasks", "All Masks", false),
                 check("strokeSequentially", "Stroke Sequentially", true),
                 p("color", "Color", col(1.0, 1.0, 1.0), ParamUi::Color),
-                p("brushSize", "Brush Size", num(2.0), slider(0.0, 50.0, 0.0, 50.0, 1)),
+                p("brushSize", "Brush Size", num(2.0), slider(0.0, 200.0, 0.0, 50.0, 1)),
                 p("brushHardness", "Brush Hardness", num(75.0), pct()),
                 p("opacity", "Opacity", num(100.0), pct()),
                 p("start", "Start", num(0.0), pct()),
@@ -132,7 +132,7 @@ pub fn specs() -> Vec<EffectSpec> {
             vec![
                 p("brushPosition", "Brush Position", pt(0.5, 0.5), ParamUi::Point),
                 p("color", "Color", col(1.0, 1.0, 1.0), ParamUi::Color),
-                p("brushSize", "Brush Size", num(6.0), slider(0.0, 50.0, 0.0, 50.0, 1)),
+                p("brushSize", "Brush Size", num(6.0), slider(0.0, 200.0, 0.0, 50.0, 1)),
                 p("brushHardness", "Brush Hardness", num(75.0), pct()),
                 p("brushOpacity", "Brush Opacity", num(100.0), pct()),
                 p("strokeLength", "Stroke Length (secs)", num(0.0), slider(0.0, 30.0, 0.0, 30.0, 1)),

crates/effects/src/generate3/tests.rs

@@ -197,6 +197,22 @@ fn write_on_and_glue_gun_draw_at_brush() {
     assert_eq!(g.img.get(0, 0), src.get(0, 0));
 }
 
+/// #2980: Brush Size of Write-on and Stroke goes up to 200 px as in After Effects (read back from
+/// After Effects 2026: setting 201 is refused with "out of range 0 to 200"), and a brush that
+/// wide paints that wide.
+#[test]
+fn brush_size_goes_up_to_200() {
+    for id in ["ec.generate.writeon", "ec.generate.stroke"] {
+        let spec = crate::find(id).unwrap();
+        let size = spec.params.iter().find(|p| p.id == "brushSize").unwrap();
+        assert!(matches!(size.ui, ParamUi::Slider { min, max, .. } if min == 0.0 && max == 200.0), "{id}: {:?}", size.ui);
+    }
+    let set = [("brushSize", num(120.0)), ("brushHardness", num(100.0)), ("brushPosition", Value::Vec2([128.0, 128.0]))];
+    let wide = run("ec.generate.writeon", &set, Image::new(256, 256));
+    assert!(wide.img.get(128 + 55, 128)[3] > 0.9, "radius 60 reaches 55 px from the centre");
+    assert!(wide.img.get(128 + 70, 128)[3] == 0.0);
+}
+
 /// #536: an animated Brush Position draws a stroke that stays (Stroke Length 0), expires
 /// after Stroke Length, and lays its dabs Brush Spacing seconds apart.
 #[test]