symV = Min(V, 1-V)

Yep, another nice trick - that should make things easier.

Quote - I hope you don't mind the challenges. I'm enjoying the fact that I seem to have a kindred spirit.

Mind? Nah, this is fun. To me procedural material is the way to go.
Don't know if you've seen FilterForge (2D procedural textures - in beta test), this is what got me into this stuff. (There I go by the name of "byRo" - pity somebody already had that name here)

Now that you have made it possible to create 3D textures with just a few lines of "code", I do find it rather strange that more folks haven't chipped in.
I'm sure we have barely sratched the surface (ugh, a pun?) of what can be done.

Rô
(PS I just can't resist a challenge)

My favourite question is "Why?", my second favourite is "Why not?"