Hidden Hangar Bay: Concept exterior

After looking back to my current work I had come to a conclusion that the scope was a bit to small and not really impressive enough.
So when I had some spare time during the last couple of weeks I designed a background which might suit the hangar bay environment and give it some more bang.

The city environment is much more clean and sophisticated looking compared to the hangar bay which was the intention. I'm playing with the idea is that you've those kind of guerilla style bases hidden in an environment that's dominated by an utopian style civilization.