Here's a good Mars site that has some interesting and creative designs and images.
I like the layout of this base, and think we should start reprodcuing the buildings in it to at least get a first layout of our base. Should all buildings only be buildable in a specific location (much easier to program), or should you be able to freely place any building?


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Also, here are some good images from the Mars Reconnaissance Orbiter, which could be used for Moon Textures as well: