I have Windows XP, but Vue 4.03 is like a rock on my machine. I have Bryce 5 too and Vue seems to be able to have much larger scenes (IOW, objects) than what Bryce 5 can. And with the volumentrics in both now, there is little difference in the rendered output, except for the fact that Vue has better plants and renders much faster. And then there is the poser import thing. I JUST LOVE THAT!! ;o) Laurie