For all of you that use AutoCAD 11 Advanced Modelling Extensions (AME) software to build 3D objects, it is now possible to convert these models to a raytracer
compatible scene file format (SCN), which is used by the RTrace package (raytracer plus utilities).
That means that we can use AutoCAD 11 to create complex objects and then produce
high quality renderings with this raytracer (in UNIX, DOS or Mac machines).
To convert the 3D objects all there is to do is to install a .EXP command into AutoCAD 11 (and 12 too, I think) and then run that new command.
If anybody wants to adapt the converter to other raytracers (Rayshade, POV, etc)
I'm willing to help.
The converter code is available at asterix.inescn.pt [192.35.246.17] in directory pub/RTrace/scene-conv/acad (files scn.h and sol2scn.h).