Thanks for the info. I'm already using a 7200rpm HD and have 256MB of Ram on an 850Mhz proocessor (PIII). I've reloaded Bryce and reapplied the upgrade to Bryce (including the preset upgrade). I suspect it may be a problem with the Radeon drivers which is why I'm trying to find anyone who is using an AIW Radeon with Bryce 3D successfully. Thanks again for trying, Rick