Merge pull request #18188 from WestLangley/dev_pmrem_test

Examples: cleanup PMREM test

examples/webgl_pmrem_test.html

@@ -42,7 +42,7 @@
 				renderer = new THREE.WebGLRenderer( { antialias: true } );
 				renderer.setPixelRatio( window.devicePixelRatio );
 				renderer.setSize( width, height );
-				renderer.gammaOutput = true;
+				renderer.outputEncoding = THREE.sRGBEncoding;
 				renderer.physicallyCorrectLights = true;
 
 				// tonemapping