Aye, it should be enough RAM to do the job, although on a MAC who can say? But, internally, I don't think Bryce 5 has limits like number of objects/number of polygons... For example, all of these complex scenes we create will actually be realtime, travellable worlds at some future point, when processor speeds are fast enough to make render times obsolete. Keep that in mind, the best is still yet to come! Hell, in ten years they'll be making video games set in our old BR5 files!