I do research on the Antikythera Mechanism - an ancient Greek astronomical calculating machine (http://www.antikythera-mechanism.gr). I am creating LW objects from 3D X-rays of the fragments of the Mechanism. I extract a stereo lithographic (STL) file from the X-rays using VGStudio Max software (specialist 3D X-ray viewing software). I then import this into LW using SHM_STL_Importer and project still photos onto the surfaces (after considerable cleaning of the chaotic geometry that the process creates as well as the filling of many holes where the X-rays don't see the visual surfaces.) The results have far surpassed my expectations (after a lot of experimenting), but I have a problem. For each fragment, I get a few random polygons that are outlined with white edges (dotted in some places). I look carefully at these polygons in modeler, but cannot see the reason for this. I have found these edges very hard to eradicate. Any suggestions?