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gpu_shader_image_desaturate_frag.glsl « shaders « gpu « blender « source - git.blender.org/blender.git - Unnamed repository; edit this file 'description' to name the repository.
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void main()
{
  vec4 tex = texture(image, texCoord_interp);
  tex.rgb = ((0.3333333 * factor) * vec3(tex.r + tex.g + tex.b)) + (tex.rgb * (1.0 - factor));
  fragColor = tex * color;
}