First of all, great job so far. The collection of fish and the diver and how they're posed are fantastic. It's like something out of a diving magazine. As someone mentioned, you may want to put a gel on the lighting from above to give it more of that eerie water look. You can find that gel for Bryce here: http://www.halcyon.com/alrives/brycetips/masters/underwater/main.html This site also has some nifty tips and tutorials on how to do underwater scenes, though with the exception of the lighting gel, you seem to have that down pretty good. My only other suggestion was really a question concerning the depth, which would indicate about 10 feet. Was this what you were going for? If not, perhaps no floor would be better to give that indication of depth. If so, then a rocky surface, like a terrain might help offset the clarity of the shadows. Using softer shadows can also give that sense of depth as well. Bryce 5 has softer shadows in the light editor (as well as the sky editor)... Hope this helps...