Add physicallyCorrectLights = true

examples/webgl_loader_gltf_extensions.html

@@ -174,6 +174,7 @@
 				renderer.setPixelRatio( window.devicePixelRatio );
 				renderer.setSize( window.innerWidth, window.innerHeight );
 				renderer.gammaOutput = true;
+				renderer.physicallyCorrectLights = true;
 
 				if (sceneInfo.shadows) {
 					renderer.shadowMap.enabled = true;