diff a/Source/RunActivity/Viewer3D/Materials.cs b/Source/RunActivity/Viewer3D/Materials.cs	(rejected hunks)
@@ -1335,6 +1352,8 @@ public override void Render(GraphicsDevice graphicsDevice, IEnumerable<RenderIte
                     var wvp = item.XNAMatrix * viewproj;
                     shader.SetData(ref wvp, item.Material.GetShadowTexture());
                     graphicsDevice.SamplerStates[0] = item.Material.GetShadowTextureAddressMode();
+                    if (item.ItemData is Matrix[] bones)
+                        shader.Bones = bones;
                     ShaderPasses.Current.Apply();
                     item.RenderPrimitive.Draw(graphicsDevice);
                 }