I'm going to experience a little further to try and see what it is exactly that bogs down before I report. Even after rebooting, I still get the problem. How many polygons to you have in your typical scenes? I'm used to Vue where I can have really complex scenes with millions of polyogns and still the program responds swiftly. I've been told that it's because of the way Vue is programmed to do a lot of stuff in the background, as you work. Multi-threding or somthing like that.