clean up glossy mirror example.
clean up glossy mirror example.

bhouston/three.js,Jozain/three.js,Jozain/three.js,Jozain/three.js,bhouston/three.js,Jozain/three.js,bhouston/three.js,bhouston/three.js,Jozain/three.js,bhouston/three.js,bhouston/three.js,Jozain/three.js