The caustics are a light gel that is set into my volumetric slab "ocean". Thanks for the nice words about my sub. It was one of several that I modeled based on one I saw in Clay's gallery (and that was also in (I think it was) Susan Kitchen's book. Most of what I know about boolean modeling I learned from Clay (either directly or indirectly). Here's mach-2 of the scene. I don't want to clutter it up too horribly much, but have added a few things and moved the sub up a bit. Keep those comments and suggestions coming people.

Could be worse, could be raining.