I was working on my post-apocalyptic mod months ago, and I was thinking about the interface. I thought, "You know, it'd be nice to have some futuristic screens that do more than just sit there." But there ain't much you can do with a simple pcx image. So then I thought, "How about optical illusions? Those are neat." So I found a bunch of images, and I intend to adapt some for the futuristic interface, but this one screamed to be used for a Chaos or Call of Cthulhu mod. (Not literally, of course.)
I can tell you that this image doesn't work well when it's a small size, but it can work with a different color scheme, if one so desired. If you put the techtree boxes on the "squirmies", it breaks the effect, so place the civ advances in between the "squirmies", and ideally, don't have too many arrows and lines linking one tech to another, if you can help it. If you're using it for Chaos or madness of that sort, you shouldn't want it too tidy and orderly, anyhow, right?