.max : This file format is undocumented and changes from version to version. It even changes with the plugins used, so forget it for games, because there's too much overhead and you get no information about it.
.3ds : It's relatively easy to read this file, it's well documented and won't change anymore. If you're looking for a source, have a look at www.wotsit.org a source is included in a filespec.
own exporter : The best way would be writing an exporter using Max SDK for your own needs. For example if you use a bones system, you can easily save this in your own file format, while you'd get big problems with other file formats.
CU
------------------
Skullpture Entertainment
#40842461