One thing that I've found that helps is breaking up the image into several files, rendering them separately and merging them back together in a paint program. My gothic cathedral was 25,030,066 polygons and I split it into 14 files, then composited them in Paint Shop Pro. This cut down on the file sizes and rendered faster. Of course, this probably isn't feasible for some images, but when it can be done, its a great time saver. -darlisa