I've found that Vue is surprisingly similar to 3DS Max in many respects, both subtle, and other.... Vue is a much better "working" app than Bryce, if for no reason other than the fact that the interface makes sense, and is easy and quick to use. The "World Browser" seems to be based loosely on Windows Explorer, more or less. I can't help but feel that the people at Corel who designed Bryce did so to for no other reason than that their bosses told them to do so, and to get it ready for release... a few fancy add-ons, and voila! Instant upgrade! Please send money! Still, Bryce 5 is as impossible to use quickly as ever before..... As for render speed, I guess the Vue 4 demo must be slowed down. I know for a fact that the Bryce 5 demo is intentionally slowed down, in order to discourage the software crackers from wnating to do so. Nevertheless, I also have been told that Bryce 5 is about 5% slower than Bryce 4, and even Vue 3 is faster at rendering than Bryce 4. Vue 4 is considerably faster than Vue 3.... I like Bryce 4. I think Bryce 5 is severely over-rated, and not much of an improvement over Bryce 4. Vue 4, on the other hand, is far above and beyond Vue 3, for many reasons. Not flawless, to be sure, but better, nonetheless. :)