Underwater Effects

Hi all I have been working on some underwater scenes for a long time now and am in need of some new ideas for creating a moss like effect on objects likehttp://i3.ytimg.com/vi/hE4IbZj5JS4/0.jpg

Just wondered if anyone had any ideas.:ba:

The best way is to use image references, study how light affects the surrounding area, and replicate it. You can use mist, transparent planes,layered planes, animated textures and lights to get the desired FX! Good luck!