Diorama Background Painting - Days of Future Past

With the Hasbro Lab Sentinel crowdfunding project complete, I wanted to bring out my old Marvel Legends Build-A-Figure Sentinels for some photos. But I needed a background that gave that dark and dystopian, Days of Future Past, New York city rubble vibe. I figured I would try to paint it. Doesn't need to be perfect. Took about three hours.