Looks like a very handy tool! If it had a "find duplicates" option (like UVMapper Pro) I think it would be even more helpful, especially if you could then delete all the duplicates. As I understand it, double sided polys in most programs are really duplicated polys with the normals reversed on one set - at least according to UVMapper - Lightwave is one of the few programs that actually support true double-sided polys. In other words, when you make a polygon mesh "double-sided" the programs like UVMPro, it is actually duplicating the geometry and flipping the normals on the newly created polys. This can quickly result in bloating the geometry and doubling the processor load to Poser. Some people do this as an expedient way of solving problems with the normals without realizing that they are creating additional mesh. It is much better to use a tool such as this to just correct the normals. Thanks, kawecki - it will be usefull indeed.