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improve mono mode
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@ -109,7 +109,7 @@ mat4 contrastMatrix(float contr)
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vec3 toGrayscale(vec3 color)
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{
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float average = (color.r + color.g + color.b) / 3.0;
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float average = dot(vec3(0.22,0.71,0.07),color);
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return vec3(average);
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}
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