Attached Link: http://www.thebest3d.com/dogwaffle/art/animations/jackwhitney/index.html

if you want to make it look more realistic with postwork: - lights in dark-green blueish tint - lots of ambient % light and soft shadows or GI and indirect lighting since there's not much direct light down there - if on PC, use Dogwaffle to add 'bubbles' - also with Dogwaffle, add light rays from above (mystic vision, kind of light diffusion + zoom blur) - add light diffusion filter - add wave distortion especially if there's bubbles and lots of rising water turbulence. samples of such postwork over Carrara anims: http://www.thebest3d.com/dogwaffle/art/animations/jackwhitney/index.html