dolphin/Data/User/Shaders/posterize.txt

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uniform sampler2D samp9;
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out vec4 ocol0;
in vec2 uv0;
void main()
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{
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float4 c0 = texture(samp9, uv0).rgba;
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float red = 0.0;
float green = 0.0;
float blue = 0.0;
if (c0.r > 0.25)
{
red = c0.r;
}
if (c0.g > 0.25)
{
green = c0.g;
}
if (c0.b > 0.25)
{
blue = c0.b;
}
ocol0 = float4(red, green, blue, 1.0);
}