Dat installation. Dayum.
Only one minor nitpick I have is that there is no apparent depth difference between the surface piping and the purple hull struts that were worked into the texture. They seem to cut each other off, as if two images were pasted next to each other. It's quite a jarring effect, so could we try making those girders' normals stand out a bit more? Or, failing that, make the regions below the girders appear more recessed?
Then again, this might just be a fault of the camera angle, and I'm going on about nothing.
Regardless, you gents did a fine job of making this thing look like a giant space city, like it was supposed to be. Excellent work!
EDIT: Took another look at the picture, I can see that there is a shadow cast on the recessed regions from the struts, but the recessed regions have a border that appears beveled, making them appear even with the struts. Perhaps cut out the bevel around the edges of the recessions and it'll look more recessed.