Yeah, I remember you and I'd like to make a collab :D
I've build 1cp (with some scenery) now and I got an idea for houses on Mars.
Note: I can make the blue hallways white if you want and the balls can be smaller, bigger, taller or shorter.
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They're all a good size, ive added a kind of route for how we can start possible raise the hallways so the first cp is under it, possibly like an s turn or if you don't want that we can go right first and then under both of the the hallways which I did in blue, personally I think he second is better but its up to you, the houses are good tho, they're a nice size and the hallway color is good, I might suggest windows or outlining the hallways but we can also do that later after we finish the track.
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Oh, I didn't mean to use this as a start (because I already build one). We can use it as a finish tho. For now this is what I have build (I'm going to build the part to cp2 and then it's your turn).
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