Reuse the same quad geometry for all scenes
Reuse the same quad geometry for all scenes

Also turn of backface culling

gideonmay/osgjs,cedricpinson/osgjs,gideonmay/osgjs,jtorresfabra/osgjs,kkuunnddaannkk/osgjs,kkuunnddaannkk/osgjs,cedricpinson/osgjs,hishamabdelrahman/osgjs,hishamabdelrahman/osgjs,jmirabel/osgjs,kkuunnddaannkk/osgjs,jmirabel/osgjs,gideonmay/osgjs,jtorresfabra/osgjs,cedricpinson/osgjs,jmirabel/osgjs,jtorresfabra/osgjs,hishamabdelrahman/osgjs