* Extra Z-levels between caverns are good. Do we need all three cavern layers? I understand that you can go down to 2 caverns, and still get everything.
From what I've read, if you skip cavern layer 3, you miss out on all the stuff that comes in cavern layer 3, like nether-caps.
I will research this and get back to you; however, why do we want to remove cavern layers? If it's there, we can always leave it alone, or open it and then seal it off.
