Thanks for all your replies - Poser on the G4 has 200meg assigned to it - as for the compression - I've tried rendering with different compression settings but there's not much difference. Incidently, the scene I"m trying to render consists of a single poser figure - I'm rendering at 768 x 576 @ 25fps (PAL format) - the PII is rendering at one frame every 20-25 secs and the G4 is rendering at one frame every 45secs - 1minute!