MeshLambertMaterial: Add support for scene.environment IBL.#32791
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MeshLambertMaterial: Add support for scene.environment IBL.#32791
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📦 Bundle sizeFull ESM build, minified and gzipped.
🌳 Bundle size after tree-shakingMinimal build including a renderer, camera, empty scene, and dependencies.
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Enables MeshLambertMaterial to receive image-based lighting from scene.environment, adding diffuse irradiance for more realistic ambient lighting without the cost of MeshStandardMaterial. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add iblIrradiance to irradiance in lights_fragment_end for Lambert - Skip classic envmap blending when using PMREM (ENVMAP_TYPE_CUBE_UV) The classic envmap_fragment code was multiplying outgoingLight by black when using PMREM textures, since it couldn't sample them as cubemaps. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This was referenced Jan 24, 2026
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Description:
Adds image-based lighting (IBL) support to
MeshLambertMaterial, allowing it to receive indirect diffuse lighting from scene.environment. This enables some Collada files to be properly lit in the editor and other scenes using environment-based lighting.