A totally spur-of-the-moment idea. Probably has very little chance of winning the coveted Golden Compass, but I think it might score some points for novelty.

I decided to go old-school with my mapping software... No, not pen and paper - that's the Light Challenge. EXCEL!!! Woohoo!!! Party Time! Excellent!

Using a Surface Chart and a bunch of random numbers and formulas, here is a prospective view of a part of the floor of a cavern. Note that because it's using random numbers in there, the final version is guaranteed to actually look nothing like this. This is mostly just proof of concept.
### Latest WIP ###
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