Merge pull request #20081 from Mugen87/dev46

WebGLRenderer: Fix update of materialProperties.envMap.

src/renderers/WebGLRenderer.js

@@ -1507,6 +1507,7 @@ function WebGLRenderer( parameters ) {
 			} else if ( materialProperties.envMap !== envMap ) {
 
 				initMaterial( material, scene, object );
+				materialProperties.envMap = envMap;
 
 			}