BWAHAHAHAHA!
No, seriously, here's an "unlocked" poly2vox. Now you can take a polygon city/terrain/whatever and translate it directly into AoS!
http://nateshoffner.com/poly2vox.exe
http://www.mediafire.com/?n5rc0ljjbk4xt21
P.S.: Of course, Poly2Vox was made by ken silverman(all hail to the awesoken!).