Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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5 years ago
#define HDRTYPE HDR_TYPE_NONE
#include "common_ps_fxc.h"
sampler FilmGrainSampler : register( s0 );
const float4 vNoiseScale : register( c0 );
struct PS_INPUT
{
float2 grainTexCoord : TEXCOORD0;
};
float4 main( PS_INPUT i ) : COLOR
{
float4 noise = tex2D( FilmGrainSampler, i.grainTexCoord );
noise.w = noise.x*(1.0-vNoiseScale.w) + vNoiseScale.w;
noise.xyz *= vNoiseScale.xyz;
return float4( noise.x, noise.y, noise.z, noise.w );
}