Const raymarch_fog_pars_fragment
raymarch_fog_pars_fragment: "#ifdef USE_FOGuniform vec3 fogColor;#ifdef FOG_EXP2uniform float fogDensity;#elseuniform float fogNear;uniform float fogFar;#endif#endif" = `#ifdef USE_FOGuniform vec3 fogColor;#ifdef FOG_EXP2uniform float fogDensity;#elseuniform float fogNear;uniform float fogFar;#endif#endif`