I wasn't even aware there were other challenge forums. I've had this bookmarked (along with the main page) for, uh, years, but didn't know of other challenge forums. This place is huge. :) Tresamie, without knowing more about your hardware and the image you're trying to render it's hard to say what could be causing the lag, it could be any number of things. Maybe when it's finished it'll be more apparant what about it could have taken so long. Looking forward to seeing it though. Regards, Mike