declare const _default: "\nuniform float material_iridescenceThicknessMax;\n\n#ifdef MAPTEXTURE\nuniform float material_iridescenceThicknessMin;\n#endif\n\nvoid getIridescenceThickness() {\n\n    #ifdef MAPTEXTURE\n    float blend = texture2DBias($SAMPLER, $UV, textureBias).$CH;\n    float iridescenceThickness = mix(material_iridescenceThicknessMin, material_iridescenceThicknessMax, blend);\n    #else\n    float iridescenceThickness = material_iridescenceThicknessMax;\n    #endif\n\n    dIridescenceThickness = iridescenceThickness; \n}\n";
export default _default;