backend/libs/three/renderers/shaders/ShaderChunk/envmap_pars_vertex.glsl.js

export default /* glsl */ `
#ifdef USE_ENVMAP

	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) ||defined( PHONG )

		#define ENV_WORLDPOS

	#endif

	#ifdef ENV_WORLDPOS
		
		varying vec3 vWorldPosition;

	#else

		varying vec3 vReflect;
		uniform float refractionRatio;

	#endif

#endif
`;