three/src/renderers/shaders/ShaderChunk/lightmap_fragment.glsl.js

JavaScript 3D library

export default /* glsl */`
#ifdef USE_LIGHTMAP

	vec4 lightMapTexel= texture2D( lightMap, vUv2 );
	reflectedLight.indirectDiffuse += PI * lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity; // factor of PI should not be present; included here to prevent breakage

#endif
`;