A program like 3D-Brush must support more 3D-Fileformats.
Requiered are dxf,3ds,stl,vrml and dae(Colada).
Only obj,lwo and fbx are not enough.
Also desirable are this Formats:
DirectX .x
Caligari .cob
Cybemotion .cmo
Blender .blend
OpenFX .mfx
Silo3D .sia
Bryce5 and 6 .br5,.br6
Carara .car
PovRay .pov
Regards
Peter