If the cave is defined as the points where some noise function is positive, couldn't you just evaluate the function to detect collisions? There are reasons why that might not work, but it's hard to tell without the OP being 20 times more clear on what the question is.

'Cave Creature Sound Effects' from Bluezone is a collection of 180 carefully recorded and designed organic creature sound effects and cave ambiences. This impressive sound library provides a wide selection of brutal monster attack sounds, detailed movements, heavy stomps and large footsteps, gurgle…

Been extremely busy working on EOTH and on my many (book) projects, and wasn't planning on making a blog entry any time soon. However–somewhere along the way–I've gotten a bit distracted, and made something completely unexpected; as you'll find out shortly!

I've barely started…