Cobra:

You should have a look at the open source program Blender . With this program (for Windows, Mac and Linux) you can import many file formats, which you can then export in OBJ or 3DS format. That way you can use many file types as a source for objects, that after conversion can be imported into SH3D.

Autodesk file types are DXF and DWG, which Blender can import.

Poser uses the file type OBJ. There are many "dialects" in this file type. In case SH3D doesn't import the files correctly, you can try to import them in Blender, and then re-export them as OBJ or 3DS.

Good luck!

Hans