Flick: Thanks, I just recently discovered this on my own, but it's nice to have my thoughts backed up. :-) I have After Effects, so I just use the Mask render as a track matte then comp it together and, walla, it now has an alpha channel. The only problem is I have found Bryce Mask renders are not always accurate for some reason. Have you found this to be true as well? Also, I did not know of its further limitations with complex occlusions. Thanks for the heads up! Take care, Tim