As well as exporting specific animations, it is possible via object naming, pivot point setup and exporting an object with the move tag, to make an object rotate around an axis at a certain speed.
- Offset Object Pivot
- Name Object: ROTATE<XYZ>_<SPEED>_<OBJECT_NAME>
- For example: ROTATEY_0.1_Object001
- Note that Y and Z axis are the opposite way around in game to 3ds Max world co-ordinates.
- Export object with move tag ticked, and ensure it is specified in the SCN entry.
Final result looks like this: