http://area.autodesk.com/blogs/max-station/n64_exporting_3ds_max_models_to_inventor
There are probably other formats you an export in 3ds max too.. But Inventor won't open 3ds files as far as I know.. Haven't tried in a while..
Hmm. IMO, importing files out of 3DS offers only average results.
Best formats will be SAT and IGES, STEP isn't supported.
I've tried some SAT imports from 3DS, but I've seen problems with creating center work axes for cylindrical faces and similar issues.
Walter
Walter Holzwarth