diff --git a/flow/layers/physical_model_layer.cc b/flow/layers/physical_model_layer.cc
index b77482ee7017f10c717645189b4f9db30fec6683..e02c803b74891958d86650db9b18f59ca09af46a 100644
--- a/flow/layers/physical_model_layer.cc
+++ b/flow/layers/physical_model_layer.cc
@@ -72,7 +72,7 @@ void PhysicalModelLayer::Paint(PaintContext& context) {
 }
 
 void PhysicalModelLayer::DrawShadow(SkCanvas* canvas, const SkPath& path,
-                                    SkColor color, int elevation,
+                                    SkColor color, double elevation,
                                     bool transparentOccluder) {
     SkShadowFlags flags = transparentOccluder ?
         SkShadowFlags::kTransparentOccluder_ShadowFlag :
diff --git a/flow/layers/physical_model_layer.h b/flow/layers/physical_model_layer.h
index bdd10971f6d5bb2987061dbf10669030e2739f26..138dd8171f3f5d8214a726c94e11050293688ef7 100644
--- a/flow/layers/physical_model_layer.h
+++ b/flow/layers/physical_model_layer.h
@@ -15,11 +15,11 @@ class PhysicalModelLayer : public ContainerLayer {
   ~PhysicalModelLayer() override;
 
   void set_rrect(const SkRRect& rrect) { rrect_ = rrect; }
-  void set_elevation(int elevation) { elevation_ = elevation; }
+  void set_elevation(double elevation) { elevation_ = elevation; }
   void set_color(SkColor color) { color_ = color; }
 
   static void DrawShadow(SkCanvas* canvas, const SkPath& path,
-                         SkColor color, int elevation, bool transparentOccluder);
+                         SkColor color, double elevation, bool transparentOccluder);
 
  protected:
   void Preroll(PrerollContext* context, const SkMatrix& matrix) override;
@@ -32,7 +32,7 @@ class PhysicalModelLayer : public ContainerLayer {
 
  private:
   SkRRect rrect_;
-  int elevation_;
+  double elevation_;
   SkColor color_;
 };
 
diff --git a/lib/ui/compositing.dart b/lib/ui/compositing.dart
index cab886f5c23ca6b96540ca84572c337d6d7a32cc..e65e55235b9b4a588bae02662aff2afd17f0412f 100644
--- a/lib/ui/compositing.dart
+++ b/lib/ui/compositing.dart
@@ -132,11 +132,11 @@ class SceneBuilder extends NativeFieldWrapperClass2 {
   /// Rasterization will be clipped to the given shape.
   ///
   /// See [pop] for details about the operation stack.
-  void pushPhysicalModel({ RRect rrect, int elevation, Color color }) {
+  void pushPhysicalModel({ RRect rrect, double elevation, Color color }) {
     _pushPhysicalModel(rrect._value, elevation, color.value);
   }
   void _pushPhysicalModel(Float32List rrect,
-                          int elevation,
+                          double elevation,
                           int color) native "SceneBuilder_pushPhysicalModel";
 
   /// Ends the effect of the most recently pushed operation.
diff --git a/lib/ui/compositing/scene_builder.cc b/lib/ui/compositing/scene_builder.cc
index 13f2fc29f1186038e968122c6d95c0495b2fe636..205292377bb33ecb4ceda75de3d79bfebdd56690 100644
--- a/lib/ui/compositing/scene_builder.cc
+++ b/lib/ui/compositing/scene_builder.cc
@@ -155,7 +155,7 @@ void SceneBuilder::pushShaderMask(Shader* shader,
 }
 
 void SceneBuilder::pushPhysicalModel(const RRect& rrect,
-                                     int elevation,
+                                     double elevation,
                                      int color) {
   SkRect cullRect;
   if (!cullRect.intersect(rrect.sk_rrect.rect(), m_cullRects.top()))
diff --git a/lib/ui/compositing/scene_builder.h b/lib/ui/compositing/scene_builder.h
index 0166800cf5479b7813f284cb36a823d7233e3e04..dc4fb31eca640163d0d169c10f3df2d69f1fba05 100644
--- a/lib/ui/compositing/scene_builder.h
+++ b/lib/ui/compositing/scene_builder.h
@@ -46,7 +46,7 @@ class SceneBuilder : public ftl::RefCountedThreadSafe<SceneBuilder>,
                       double maskRectTop,
                       double maskRectBottom,
                       int blendMode);
-  void pushPhysicalModel(const RRect& rrect, int elevation, int color);
+  void pushPhysicalModel(const RRect& rrect, double elevation, int color);
 
   void pop();
 
diff --git a/lib/ui/painting.dart b/lib/ui/painting.dart
index 1e635ffcb2ba061ba394dba5938cb11e9ad7e30e..bfd612cc8e561bb10d1323f1a588ce28f5477175 100644
--- a/lib/ui/painting.dart
+++ b/lib/ui/painting.dart
@@ -1608,13 +1608,13 @@ class Canvas extends NativeFieldWrapperClass2 {
   /// Draws a shadow for a [Path] representing the given material elevation.
   ///
   /// transparentOccluder should be true if the occluding object is not opaque.
-  void drawShadow(Path path, Color color, int elevation, bool transparentOccluder) {
+  void drawShadow(Path path, Color color, double elevation, bool transparentOccluder) {
     _drawShadow(path, color.value, elevation, transparentOccluder);
   }
 
   void _drawShadow(Path path,
                    int color,
-                   int elevation,
+                   double elevation,
                    bool transparentOccluder) native "Canvas_drawShadow";
 }
 
diff --git a/lib/ui/painting/canvas.cc b/lib/ui/painting/canvas.cc
index 34d48d0c3529574325a7485dce8920a7e3021a04..43add7a989d72f05125a023d30e2b3a95025ff4d 100644
--- a/lib/ui/painting/canvas.cc
+++ b/lib/ui/painting/canvas.cc
@@ -380,7 +380,7 @@ void Canvas::drawAtlas(const Paint& paint,
 
 void Canvas::drawShadow(const CanvasPath* path,
                         SkColor color,
-                        int elevation,
+                        double elevation,
                         bool transparentOccluder) {
   flow::PhysicalModelLayer::DrawShadow(canvas_,
                                        path->path(),
diff --git a/lib/ui/painting/canvas.h b/lib/ui/painting/canvas.h
index a47b28d8dd44bc88cdc547b532707a5f983ba631..f10e3ac283de10efcb8214759516c4f248d0f883 100644
--- a/lib/ui/painting/canvas.h
+++ b/lib/ui/painting/canvas.h
@@ -159,7 +159,7 @@ class Canvas : public ftl::RefCountedThreadSafe<Canvas>,
 
   void drawShadow(const CanvasPath* path,
                   SkColor color,
-                  int elevation,
+                  double elevation,
                   bool transparentOccluder);
 
   SkCanvas* canvas() const { return canvas_; }