/* 4x4 Bayer ordered dithering in UV space */

void Dither_float(float In, float2 UV, out float Out)
{
    
    float DITHER_THRESHOLDS[16] =
    {
        1.0 / 17.0,  9.0 / 17.0,  3.0 / 17.0, 11.0 / 17.0,
        13.0 / 17.0,  5.0 / 17.0, 15.0 / 17.0,  7.0 / 17.0,
        4.0 / 17.0, 12.0 / 17.0,  2.0 / 17.0, 10.0 / 17.0,
        16.0 / 17.0,  8.0 / 17.0, 14.0 / 17.0,  6.0 / 17.0
    };
    uint index = (uint(UV.x) % 4) * 4 + uint(UV.y) % 4;
    Out = In - DITHER_THRESHOLDS[index];
}