I started playing with the code that has gathered up in the 3d-Models forum thread in Worldwind. Basically dumping it into eclipse and running it, ultimately I want to load complex DXF models. But the dxf format is not simply faces/vertices/edges, so will require more digging around and understanding. At least Autodesk has a free viewer to make my life easier and check while I make progress. The same can't be said about other 3d formats. They also make the awsome 3ds-MAX, so I can possibly use that as a format converter.