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Add a brightness multiplier for PBR lights to make it closer match classic light model brightness

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Magnus Norddahl 2025-07-10 05:57:58 +02:00
commit d0dc14c2c7
1 changed files with 3 additions and 1 deletions
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4
wadsrc/static/shaders/scene/lightmodel_pbr.glsl
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@ -48,6 +48,8 @@ vec3 ProcessLight(const DynLightInfo light, vec3 albedo, float metallic, float r
{
vec3 L = normalize(light.pos.xyz - pixelpos.xyz);
vec3 H = normalize(V + L);
const float brightnessScale = 2.5; // For making non-PBR and PBR lights roughly the same intensity
float attenuation = distanceAttenuation(distance(light.pos.xyz, pixelpos.xyz), light.radius, light.strength, light.linearity);
if ((light.flags & LIGHTINFO_SPOT) != 0)
@ -69,7 +71,7 @@ vec3 ProcessLight(const DynLightInfo light, vec3 albedo, float metallic, float r
attenuation *= shadowAttenuation(light.pos.xyz, light.shadowIndex, light.softShadowRadius, light.flags);
}
vec3 radiance = light.color.rgb * attenuation;
vec3 radiance = light.color.rgb * attenuation * brightnessScale;
// cook-torrance brdf
float NDF = DistributionGGX(N, H, roughness);