You cannot turn them off during runtime and I would not expect them to free memory when off screen. However, they should require very little CPU when offscreen, since the animation and lighting is not being updated. I will check and make sure this is true when lighting is active also.
Ah ok, thought so. I dont have lighting at all yet, and all is running smooth at 144fps. It's just the memory problem that starts building up until the crash. Will test on earlier versions of Chrome later.
