@ Hyncharas:
Hi
I am Lighthorse and just a note I do not work for Ren-X but I have done alot of Modding.
Wolfenstine, Blake Stone, Heretic, Hexen, Doom, Doom II, FMS, AeroFlight just to start.
My FMS models are still being used http://lighthorse.ws/
I also worked on and designed flight maps for Condor including buildings and other objects.
So to the point
Your stuff is coming along still a little rough and you really need to texture. I might be able to help
you if you want it, I have helped others while on line. You can PM me if you want.
I have used AutoCad, 3DStudio, others but I prefer Metasequoia
and then save to where or what I want it to be.