well, i've just received a new Vue 4 CD for Mac OS X (the first CD i had was damaged, and unreadable), and after installing i can say that this version is really buggy. The application quits in editing materials, sky, clouds, point of view... The Apple Guidelines are not implemented (Cmd-D to go to the desktop don't work as other keyboards shortcuts - Non standard interface), and the mac PZ3 files can not be imported. I will try disabling OpenGL. The only good point i've seen is the astounding fastness of the rendering. I was a bryce fan. I was. But Bryce is definetely too slow... :)