Thanks for the info, Pete. I used to play with priorities on my Amiga, though you really didn't have to on that. I'm really hoping Eon will address this. Have you ever used Bryce? As of Bryce 4 it went to idle time for rendering. You see no difference whatsoever when you're inside the program. None. Most people don't even realize it. While rendering you can CTRL-M to minimize the program and go on your merry way. Render speed is barely affected at all since the processor spends most of its time waiting anyway.