Sculpt: Render Face Sets always as flat shading

This removes the smooth shading rendering from the face set overlay when
smooth shading is enabled.

Reviewed By: jbakker

Maniphest Tasks: T74906, T74622, T75331, T76530

Differential Revision: https://developer.blender.org/D7105

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/draw/engines/overlay/shaders/sculpt_mask_frag.glsl b/source/blender/draw/engines/overlay/shaders/sculpt_mask_frag.glsl
new file mode 100644
index 00000000000..a778e518392
--- /dev/null
+++ b/source/blender/draw/engines/overlay/shaders/sculpt_mask_frag.glsl
@@ -0,0 +1,10 @@
+
+flat in vec3 faceset_color;
+in float mask_color;
+
+out vec4 fragColor;
+
+void main()
+{
+  fragColor = vec4(faceset_color * vec3(mask_color), 1.0);
+}