Nope everything is installed in the poser 7 run time. I never use external runtimes as I have had tooo many problems with tme. I don't even use the "downloads' runtime. Thanks for the suggestion though. I have run ito a new problem too. As I rebuild the scene it stops working. With several items in the scene it works but as the quantity of props increases it stops working. So it could be a complexity problem. Our WWS scenes are very complex with loads of props in them. This may just cause the RayTracing engine to choak out. The same files render in Poser 6 and Poser 5 with out a single problem. So at this point I am waiting to hear back from e-Frontier for some helpful hints.