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

export default /* glsl */`
#ifdef USE_FOG

	uniform vec3 fogColor;
	varying float vFogDepth;

	#ifdef FOG_EXP2

		uniform float fogDensity;

	#else

		uniform float fogNear;
		uniform float fogFar;

	#endif

#endif
`;