Unity Shader Dither

https://blog.demofox.org/2022/01/01/interleaved-gradient-noise-a-different-kind-of-low-discrepancy-sequence/

输入一张图

shader处理下

half3 randomVal = InterleavedGradientNoise(IN.clipPos, 0);
half3 col =  tex2D(_MainTex, IN.uv + saturate(randomVal * float2(1.0/1920, 1.0/1080) * _Float1));
return half4(col, 1);

很像是boxblur，但是又不是，这就是随机数的魅力