You should check in Forging 101. They explain it there, in addition to how you use it. Happy further forging!
Spam and a necro... Anyway so that this isn't spam, Vertebraille is one of my favorite maps. Awesome gameplay, incredible aesthetics, and true forging vision give this map a permanent place on my hard drive. 10/10
Since people revived this thread, what about remaking it on Sandbox? I think it would be great to see it in the Skybouble, and we could compare Foundry with the Sandbox.