Bryce does have limits. Remember, the size of your file is limited to the amount of RAM your system has. Bryce will not make use of virtual memory, or paging files. Ex: if your file is 100 megs, you need to have at least 200 megs of RAm (hard). As for file size, the maximum file size bryce will accept is a 1 gig. file. Number of objects and number of polys is also important. From what I have tested, the max number byrce will accept is about 20-25,000 objects at around 1 gig. These tests were performed on a windows machine with 3.5 gigs of RAM running dual 2.4 Mhtz Xeon processors. WIN XP.