H there.
There's some really amazing work going on in these forums, I am inspired to continue persevering to see what the soma modding community will create!
People are using the tools to great effect, and I wanted to learn how to create custom entities - such as an animated character!
http://imgur.com/YJP8u6h
I used blender with the default collada exporter - there is also a plugin called 'better collada exporter'
I made it 1 texture per material per object
Blender will produce a .dae which you can open with model viewer.
If you get no textures in the model viewer, you can open the material editor and create a MAT file by importing your image
You can then import it into model editor - which i am still learning to use
I think I triangulated faces 1 too many times