williamshell, that's just untrue about rendering on machines. I have read plenty of posts on Poser and other 3D apps where someone could not render, sent the exact file to others, and they said things like, "rendered fine on my machine", etc. Of course, when talking hardware, we're talking about stability, firmware, and drivers. Although firmware is software, it's not software installed on your hard drive and executed by the OS - but into an EPROM (or similar). This is, AFAIAC, hardware. And, although single program execution is primarily deterministic, the entire set of software (drivers, dlls, threads, processes) running on a computer is somewhat chaotic. You're talking about the interaction of hundreds or thousands of them, each going through the same pipe, in somewhat arbitrary or indeterministic time intervals (determined by priorities, user interaction, external and internal triggers). Since the essence of chaotic theory is that slight variances lead to majorly different results, this accurately explains the problems with most computers today. The best that can be done is to code with the strictest standards, using as much stable code (OS dlls, for instance) as possible. Still, I agree with you totally concerning whether or not Poser was "recoded". It certainly was not. It was revamped and had code modules added - sometimes poorly. BYS