Hi all, I just go the upgrade to Bryce 5 (using on MAC). Had no problem with the serial number. I kind of like the interface. I'm used to the one in 4, so it looks a little more jazzy to me, that's all. I have a three questions for anyone who might be willing to help or suggest ideas. 1. What are "metaballs" used for? The manual doesn't say much about them. What do any of you use them for? I'm new to the concept. Looks interesting, if I can find a use. 2. Tree Editor. Mine opens with red leaves. Seems very odd that red would be the default color, unless they designed it in October in New England (which I doubt). Also, I tried the willow tree preset, just to see what it would do. Doesn't look anything like a willow to me. Anyone else notice this? 3. Does Bryce 5 seem to render a bit slower than Bryce 4? I know I have to upgrade my computer (looking at the new Apple G4 867) which is (sniff) only two years old, but apparently ancient history. Thanks!