This is the cg talk challenge
http://forums.cgsociety.org/showthread.php?t=370846
Its very informal and I like the subject.
This is my first good result. I am focusing on the underwater lighting here, I plan on splinting up the render at the waterline and composting the above and below into one shot. Any suggestions ?
Next
do a volumetric light pass
set up the above water lights
textures(just place holders and materials now)
BTW This is more or less my attempt at a copy of a really nice render in that contest. I wanted to see if I could do it with Blender.
Credits: This scene was modeled by Serguei Kalentchouk (known as ShadowM8 on CGTalk forum.)
very nice apart from your caustics look like you use the vorono-thingy texture…
and i shouldnt be able to guess!
The caustics are an image tex, but you are right they dont look that good. Some fixes.
I did a volume shadow pass but I messed up and didnt include the water mesh. I will do one with the water so when I compose the water line should be clear.
Hi, good work, 
Have you tried using the texture warp setting, - you can use 1 texture to warp another in the next channel…
I think it might look good if you had 2 layers of water texture and had both with an animated worp texture- just hook both warp texture coords to animaped empties so you can simplate warp ripples,
I am getting tired of playing with this I may make a new sky some time. I do like the waterline at the camera.
