source/blender/draw/modes/shaders/sculpt_mask_vert.glsl


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uniform mat4 ModelMatrix;

uniform float maskOpacity;

in vec3 pos;
in float msk;

out vec4 finalColor;

void main()
{
  vec3 world_pos = point_object_to_world(pos);
  gl_Position = point_world_to_ndc(world_pos);

  float mask = 1.0 - (msk * maskOpacity);
  finalColor = vec4(mask, mask, mask, 1.0);
}