"1) I usually don't use this one until I have to, but DO use it." Well, of course every person has his workflow and experienced users like you always developed over the time the workflow that suits them best. But for beginners reading this, I would like to reinforce this point. Don't under-rate it's importance. I have the feeling that what is experienced as memory leak is really Vue having to cope with too many large textures, refreshing them after every action, and trying to keep them in memory as long as possible in order to improve the performance. Perhaps a little bit too long. But if I am right in my guess, then this is something that we users have some control on, not only the programmers. By hiding unneeded layers during scene preparation, we spare Vue the taks of keeping in memory large chunks of bitmap data that we dont really need at the moment, and re-reading them every time we adjust the scene. This does a long way for preventing the much feared "accumulation" problem. Call it "safe vueing" if you like :-) It is possible that also turning preview of object into wireframes might have the same effect without having to hide whole layers. I find that turning on/off wireframes quite tedious so I generally prefer to hide a whole layer alltogether.