Enclosed is a port of rayshade 4.0.6enh2 to OS/2 2.1. Most of the patches posted through July 20, 1993 to the rayshade-users mailing list have been added. The only problem I have noticed so far is that sweptsph doesn't seem to be working properly. It looks like it is sweeping the bounding box, not a sphere. This executable was compiled with Borland C++ v1.0 for OS/2. It has a stack size of 2 meg, so it shouldn't have any trouble with any but the most complex of scenes. David Browne Knowledge Based Systems, Inc. College Station, Texas dbrowne@kbsi.com