modify some things to remove warnings on server and in browser console

src/components/World/systems/renderer.js

@@ -4,6 +4,7 @@ function createRenderer() {
   const renderer = new WebGLRenderer({ antialias: true });
 
   // turn on the physically correct lighting model
+  // (The browser complains: "THREE.WebGLRenderer: .physicallyCorrectLights has been removed. Set enderer.useLegacyLights instead." However, that changes the lighting in a way that doesn't look better.)
   renderer.physicallyCorrectLights = true;
 
   return renderer;