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reduce indirect specular lighting at grazing angles

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This commit is contained in:
Tuomas Katajisto 2026-03-21 10:47:57 +02:00
parent f21fe89783
commit a262a590b2
1 changed files with 4 additions and 1 deletions
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5
src/shaders/shader_trile.glsl
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@ -554,7 +554,10 @@ void main() {
indirectSpec = mix(indirectSpec, vec3(specLum), metallic);
vec2 envBRDF = texture(sampler2D(brdf_lut, rdmsmp), vec2(max(dot(N, V), 0.0), roughness)).rg;
light += indirectSpec * (Frough * envBRDF.x + envBRDF.y) * rdm_spec_scale;
float NdotV_s = max(dot(N, V), 0.0);
float roughnessBell = 1.0 - 0.7 * sin(roughness * PI);
float grazingSuppress = 1.0 - 0.9 * roughness * sin(roughness * PI) * pow(1.0 - NdotV_s, 2.0);
light += indirectSpec * (Frough * envBRDF.x + envBRDF.y) * rdm_spec_scale * roughnessBell * grazingSuppress;
// Indirect diffuse (interpolated from neighbor probes)
vec3 indirectDiff = sample_rdm_diff(N, vpos - hemispherePos, local) * rdm_tint;