When I first saw this my first thought was "wow, Shanghai is looking really crazy these days," thinking that it was a photo. Then I zoomed in and saw it was a painting. The author is a young French artist named Klaus Pillon—who says it is the world map for an incoming indie video game. His work is great.
Klaus Pillon is a French freelance concept artist and illustrator who graduated in October 2011. He has been working with Rogue Moon Studio lately (the images above are from a game they are developing.)