dolphin/Data/Sys/Shaders/posterize2.glsl

float bound(float color)
{
	if (color < 0.35)
	{
		if (color < 0.25)
			return color;

		return 0.5;
	}

	return 1.0;
}

void main()
{
	float4 c0 = Sample();
	SetOutput(float4(bound(c0.r), bound(c0.g), bound(c0.b), c0.a));
}