that's pretty neat, I'm glad it's useful. the DX render looks cool, I assume you generated the normal maps via some automated tool (like crazybump)?
I've uploaded a new version (1.1) - had to double a certain epsilon so that some polygons are being cut properly during the CSG stage (this only happened with some maps with really bad topology)
v1.2 up now - no functional changes, except that the executable is now signed with a certificate to improve trust and validate that it hasn't been tampered with
v1.3 up now - faster CSG for large maps
v1.5 up now - minor fixes, optional custom yaw rotation, merge final polys after CSG, much smaller binary, experimental support for quake .map files