Currently these are the export formats as of 1.6 Export OBJ, QEF, XML, RAWVOX, Minecraft .SCHEMATIC, VOX, VXL. Currently their still working on 2.0 for steam, so I don't know if in the future they'll provide more export options. It's actually kind of fun to use and from what I've seen the models are fairly easys to animate. However If you use them in the engine as a regular 3d model file, the polygon count would be too high. Reason I was wondering if you'd consider support for .qb files. I do think if you were to implement it, it'd give more options for art assests in the engine than what is currently available since the vox models are easier to create.