Great idea Bryce, glad you got this started.
I'll start with this illustration I did a while back. I'm planning to continue this as a sort of series showing various sci-fi environments inhabited by mechs.
Inspired by all the stuff going on for the Polycount competitions, I thought I'd go back and finish up an old environment scene that I've had sitting on the shelf for a while. It's an industrial art deco environment using UDK. This one is still pretty WIP.