simplified envmap defines

src/renderers/shaders/ShaderChunk/envmap_fragment.glsl.js

 export default /* glsl */`
 #ifdef USE_ENVMAP
 
-	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP ) || defined( PHONG )
+	#ifdef ENV_WORLDPOS
 
 		vec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );
 

src/renderers/shaders/ShaderChunk/envmap_pars_fragment.glsl.js

@@ -5,6 +5,12 @@ export default /* glsl */`
 
 	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP ) || defined( PHONG )
 
+		#define ENV_WORLDPOS
+
+	#endif
+
+	#ifdef ENV_WORLDPOS
+
 		varying vec3 vWorldPosition;
 		uniform float refractionRatio;
 	#else

src/renderers/shaders/ShaderChunk/envmap_pars_vertex.glsl.js

 export default /* glsl */`
 #ifdef USE_ENVMAP
 
-	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP ) || defined( PHONG )
+	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP ) ||defined( PHONG )
+
+		#define ENV_WORLDPOS
+
+	#endif
+
+	#ifdef ENV_WORLDPOS
+		
 		varying vec3 vWorldPosition;
 
 	#else

src/renderers/shaders/ShaderChunk/envmap_vertex.glsl.js

 export default /* glsl */`
 #ifdef USE_ENVMAP
 
-	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP ) || defined( PHONG )
+	#ifdef ENV_WORLDPOS
 
 		vWorldPosition = worldPosition.xyz;