precompile shader

examples/jsm/utils/RoughnessMipmapper.js

@@ -35,6 +35,7 @@ var RoughnessMipmapper = ( function () {
 	var RoughnessMipmapper = function ( renderer ) {
 
 		_renderer = renderer;
+		_renderer.compile( _scene, _flatCamera );
 
 	};
 

examples/webgl_loader_gltf.html

@@ -56,11 +56,11 @@
 
 						// model
 
+						var roughnessMipmapper = new RoughnessMipmapper( renderer );
+
 						var loader = new GLTFLoader().setPath( 'models/gltf/DamagedHelmet/glTF/' );
 						loader.load( 'DamagedHelmet.gltf', function ( gltf ) {
 
-							var roughnessMipmapper = new RoughnessMipmapper( renderer );
-
 							gltf.scene.traverse( function ( child ) {
 
 								if ( child.isMesh ) {