Most 3D printing machines utilize .STL files and since iTracer exports .3ds files, your model needs to be converted. I used Meshlab
, which is an open-source mesh editing tool for this process, but any 3D modeling program should capable of converting the .3ds to a .STL file. In Meshlab, open the .3ds file then go to File/Save As... and save the file an .STL or whichever file format you choose. From here you can send the model to a service bureau such as Shapeways
to have it printed. Or to any other rapid prototyping machine such as a RepRap or Makerbot. I am fortunate enough to have access to a Dimension ABS printer, so I printed my model on that, but using a homemade printer would be much more rewarding.