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tweak indirect SSS to be a little bright like it used to be. Tweak sampling for shadow filtering, ssao, rtao, ssgi, and specular reflections.

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Xonk
2023-10-14 23:34:52 -04:00
parent 87d25d0637
commit d9d3cd0c2d
24 changed files with 238 additions and 271 deletions
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14
shaders/lib/specular.glsl
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@ -106,7 +106,7 @@ vec3 rayTraceSpeculars(vec3 dir, vec3 position, float dither, float quality, boo
return vec3(1.1);
}
float xonk_fma(float a,float b,float c){
float fma(float a,float b,float c){
return a * b + c;
}
@ -114,7 +114,7 @@ float xonk_fma(float a,float b,float c){
vec3 SampleVNDFGGX(
vec3 viewerDirection, // Direction pointing towards the viewer, oriented such that +Z corresponds to the surface normal
vec2 alpha, // Roughness parameter along X and Y of the distribution
vec2 xy // Pair of uniformly distributed numbers in [0, 1)
float xy // Pair of uniformly distributed numbers in [0, 1)
) {
// alpha *= alpha;
// Transform viewer direction to the hemisphere configuration
@ -122,9 +122,9 @@ vec3 SampleVNDFGGX(
// Sample a reflection direction off the hemisphere
const float tau = 6.2831853; // 2 * pi
float phi = tau * xy.x;
float phi = tau * xy;
float cosTheta = xonk_fma(1.0 - xy.y, 1.0 + viewerDirection.z, -viewerDirection.z) ;
float cosTheta = fma(1.0 - xy, 1.0 + viewerDirection.z, -viewerDirection.z) ;
float sinTheta = sqrt(clamp(1.0 - cosTheta * cosTheta, 0.0, 1.0));
// xonk note, i dont know what im doing but this kinda does what i want so whatever
@ -169,7 +169,7 @@ void DoSpecularReflections(
vec3 FragPos, // toScreenspace(vec3(screenUV, depth)
vec3 WorldPos,
vec3 LightPos, // should be in world space
vec3 Noise, // xy = noise texure. z = simple blue noise
vec2 Noise, // x = bluenoise z = interleaved gradient noise
vec3 Normal, // normals in world space
float Roughness, // red channel of specular texture _S
@ -199,7 +199,7 @@ void DoSpecularReflections(
vec3 ViewDir = -WorldPos*Basis;
#ifdef Rough_reflections
vec3 SamplePoints = SampleVNDFGGX(ViewDir, vec2(Roughness), fract(R2_Sample(frameCounter%40000) + Noise.xy));
vec3 SamplePoints = SampleVNDFGGX(ViewDir, vec2(Roughness), Noise.x);
if(Hand) SamplePoints = normalize(vec3(0.0,0.0,1.0));
#else
vec3 SamplePoints = normalize(vec3(0.0,0.0,1.0));
@ -247,7 +247,7 @@ void DoSpecularReflections(
#endif
float reflectLength = 0.0;
vec3 RaytracePos = rayTraceSpeculars(mat3(gbufferModelView) * L, FragPos, Noise.z, float(SSR_Quality), Hand, reflectLength);
vec3 RaytracePos = rayTraceSpeculars(mat3(gbufferModelView) * L, FragPos, Noise.y, float(SSR_Quality), Hand, reflectLength);
float LOD = clamp(pow(reflectLength, pow(1.0-sqrt(Roughness),5.0) * 3.0) * 6.0, 0.0, 6.0); // use higher LOD as the reflection goes on, to blur it. this helps denoise a little.
if(Roughness <= 0.0) LOD = 0.0;