So far, so good. Is it a live cave system or a dead one? In other words, is cave still being created or is it like coral (that leaves a dead exoskeleton)?

First Photoshop effort, eh? Any thoughts on GIMP? I am currently updating/working on a cave system using a shattershot approach. Most of it was done in CC2 Pro, and I haven't figured out how to touch it up in GIMP yet.

Sorpaw