Tutorial Milkshape3d file (in 3dmax) for irrlicht
edit:
ms3d dont export animations without bones, i see it later,
but md3 archives work very well
look for : 3ds Max MD3 Exporter v2.2
in : http://www.maxplugins.de/
and put in 3dsmax plugin folder
https://youtu.be/JB5ReUBSyJQ
https://oficinadobill.wordpress.com/