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export default /* glsl */`
#ifdef USE_FOG
#ifdef FOG_EXP2
float fogFactor = whiteCompliment( exp2( - fogDensity * fogDensity * fogDepth * fogDepth * LOG2 ) );
#else
float fogFactor = smoothstep( fogNear, fogFar, fogDepth );
#endif
gl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );
#endif
`;