cal3d has Milkshape and 3DS Max exporters.

3DS Max
http://www.maxplugins.de/max9_32.php?search=cal3d&sort=Author
http://download.gna.org/cal3d/documentation/modeling/tutorial.html

Milkshape see step 2
http://www.marisa9.com/imvu/misc/milkshape.html

Blender
http://blenderartists.org/forum/showthread.php?t=77833&highlight=cal3d

cal3d homepage http://home.gna.org/cal3d/
cal3d faq http://cal3d.sourceforge.net/docs/api/html/cal3dfaq.html

Quote:

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lexx If you don't like Cal3d, in Vatan engine you can remove it becouse the source code is open to change and import any other format or something you want. You can even create your own file format(but whatever you do, create a file format or remove cal3d, you need a programmer for that).
Something that is not possible in some engines.

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I am still trying to decide on whether to use Vatan or A7 Professional for a rpg in space.

For A7 Professional I am wondering how the lighting is going to affect all models level. If you use brush or level geometry the build times are long to tweaking scenes is a nightmare. I am hoping that maybe this http://www.malabar.tv/max2gs2.htm will help. Another concern is having to change the scripting every 3 years or when they upgrade to A8 so if you are in the middle of a project you would have to redo everything.

I like the A7 community here and with the max exporter it looks like it would be simple to get artwork into A7. The AUMs are really cool and there are a lot of resources available for A7 and tutorials.