Unearthly Challenge 2013

So I'e entered the Unearthly Challenge some friends, Tim Diaz and Liz Kirby. The challenge is to pick a theme and build an environment around it. The theme we chose is "gravity"... or "anti-gravity"... or "floaty buildings". The thread where you can find our concept and additional art can be found here:
http://forums.3dtotal.com/showthread.php?t=120437
Pop in. Take a look. Kick off your shoes and stay awhile. Here's some work I've done so far.