Here are a few more images from John Carter of Mars.
These are a couple of designs for the "enemy" city of Zodanga. It's supposed to be a very militarized industrial city. My thought for the design was that they would have built within a pair of overlapping meteor craters. Barsoom (Mars) in the stories is metal-poor, so my hypothesis was that the main source of mined metals would be nickel-iron meteors. Zodanga then is built within a deep mine at the center of the craters, while the debris walls would form an effective natural battlement.
This first shot features John's escape from Zodanga riding a stolen Zodangan flyer (beautifully designed by Ryan Church.)
John, Deja and company escape from the Warhoons on their Thoats, with Woola guarding the flank.
The ruined city of Thark. I loved the idea of erosion happening from below, rather than above, and I played with it throughout the various cities. Buildings would be glassy fused sand, so the thought of a kind of coastal erosion look from the eventual decay of the bonding agent and the constant sandstorms seemed natural. I also love the gravity-defying quality, since Mars' low gravity is such a major plot point in the story.
The City of Helium. I wanted a much softer look for this city, and more modern. To keep a consistent look though, I thought that it would be cool to have the Barsoomian architects adopt the look of erosion from their ancient cities as a deliberate design statement. I thought it could be like the way we artificially age materials, or grow ivy on walls, something that lends an artificial air of authenticity to relatively new architecture.
I also played with the idea of flared bases that were then undercut to emphasise the gravity-defying quality of Barsoomian architecture.
Jon Favreau also wanted to hint at an allusion to the Twin Towers in the twin towers of Helium, so topped them off with a bit of the WTC fluting.