Hi thanks for your ideas

However I cannot have any rays of light since the action is deap below water so we wont see the water level. As for where the sun comes from is yet to decided. I played with the fog and water effects from Maya and I got more closely what am looking for. After looking at some pictures on the net I realise am missing so flotting particles around. I'll post a new screenshot of the overall scenery soon.

Thx