I have Vue 4 too - for Mac - bought it whilst waiting for Bryce 5.5. On the Mac at least its way faster than Bryce 5.5 for similar settings (render quality). I suspect that this is because Vue 4 on the Mac is simply better optimised for Mac OS X. On the operating system side - both Vista and Tiger introduce many new API's for video, graphics (eg, in Tiger you get Core Graphics, in Vista Presentation Foundation) etc, etc. Bryce doesn't take advantage of any of Tiger's new API's (actually, its still clinging on to mostly the basic 'carbon' API's) - not least because you would begin to get feature differences between Mac and Windows. If you follow the recent Apple & Intel announcements, Apple's stated intent was to be fully Intel by the middle of 2007, with first products in June of this year. Apple is ahead of that, and Intel have modified their roadmap such that the dual core's that Apple need for the Pro line appear about the middle of this year - I would be amazed if Apple isn't all Intel by end of the year. Sure - I would bet that Daz outsources code work, given the low cost of Indian coders they would be dum not to. But that still has to be project managed, the code integrated and verified and so on - there will remain a bottle neck in such a small company. Garry