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Make ambient light contribution conditional on lightmaps

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This commit is contained in:
Martin Lysell 2025-07-11 14:40:28 +02:00
parent 51094b3627
commit 6c0b3e332d
1 changed files with 10 additions and 1 deletions
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11
crates/bevy_pbr/src/render/pbr_functions.wgsl
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@ -642,7 +642,16 @@ fn apply_pbr_lighting(
#endif // ENVIRONMENT_MAP
// Ambient light (indirect)
indirect_light += ambient::ambient_light(in.world_position, in.N, in.V, NdotV, diffuse_color, F0, perceptual_roughness, diffuse_occlusion);
// If we are lightmapped, disable the ambient contribution if requested.
// This is to avoid double-counting ambient light. (It might be part of the lightmap)
#ifdef LIGHTMAP
let enable_ambient = view_bindings::lights.ambient_light_affects_lightmapped_meshes != 0u;
#else // LIGHTMAP
let enable_ambient = true;
#endif // LIGHTMAP
if (enable_ambient) {
indirect_light += ambient::ambient_light(in.world_position, in.N, in.V, NdotV, diffuse_color, F0, perceptual_roughness, diffuse_occlusion);
}
// we'll use the specular component of the transmitted environment
// light in the call to `specular_transmissive_light()` below