I am learning in my search for 3D models to use in my new version of I, Creator 2 -- Goddess of the Hunt that unless I have Autodesk 3D Max Studio, avoid 3D models with the .max extension. No other software can open these files. I am hoping people will find this useful. And, Autodesk verifies that here:
https://forums.autodesk.com/t5/3ds-max-forum/i-need-a-max-file-viewer/td-p/5431815
https://forums.autodesk.com/t5/3ds-max-forum/i-need-a-max-file-viewer/td-p/5431815