Force antialias on by default.

src/hub.html

@@ -28,6 +28,7 @@
     </audio>
 
     <a-scene
+        renderer="antialias: true"
         networked-scene="adapter: janus; audio: true; debug: true; connectOnLoad: false;"
         physics="gravity: -6;"
         mute-mic="eventSrc: a-scene; toggleEvents: action_mute"