tweak the sun pre-filtering trick

devshgraphicsprogramming · devshgraphicsprogramming · commit 4298508cba6b · 2022-01-27T14:00:05.000+01:00
diff --git a/examples_tests/22.RaytracedAO/raytraceCommon.glsl b/examples_tests/22.RaytracedAO/raytraceCommon.glsl
@@ -396,7 +396,7 @@ void Contribution_initMiss(out Contribution contrib)
 {
 	vec2 uv = SampleSphericalMap(-normalizedV);
 	// funny little trick borrowed from things like Progressive Photon Mapping
-	const float bias = 0.25*sqrt(pc.cummon.rcpFramesDispatched);
+	const float bias = 0.0625f*pow(pc.cummon.rcpFramesDispatched,0.08f);
 	contrib.albedo = contrib.color = textureGrad(envMap, uv, vec2(bias*0.5,0.f), vec2(0.f,bias)).rgb;
 	contrib.worldspaceNormal = normalizedV;
 }

Original file line number	Diff line number	Diff line change
`@@ -396,7 +396,7 @@ void Contribution_initMiss(out Contribution contrib)`
`396`	`396`	`{`
`397`	`397`	`vec2 uv = SampleSphericalMap(-normalizedV);`
`398`	`398`	`// funny little trick borrowed from things like Progressive Photon Mapping`
`399`		`- const float bias = 0.25*sqrt(pc.cummon.rcpFramesDispatched);`
	`399`	`+ const float bias = 0.0625f*pow(pc.cummon.rcpFramesDispatched,0.08f);`
`400`	`400`	`contrib.albedo = contrib.color = textureGrad(envMap, uv, vec2(bias*0.5,0.f), vec2(0.f,bias)).rgb;`
`401`	`401`	`contrib.worldspaceNormal = normalizedV;`
`402`	`402`	`}`