IWTE - Units in Blender
The .dae files used for the Collada import/export can also be used with 3ds Max, however, max users absolutely have to use the OpenCollada plugin and file format when importing/exporting files, max comes with the AutodeskCollada file format by default which neither imports nor exports files from the game correctly.
Export and Import
The most useful method of export involves matching the unit .mesh with it's skeleton basepose and one or more animations. This can be done via the drop-down menu in IWTE or by the IWTE Task file system. A task file is recommended for complex combinations and is the only way to also incorporate weapon animations.