Well, i was busy this days to wait your feedback, so i worked myself, and i gonna be honest with you guys, i had not read anything from Oshyan's comment onwards
BTW i'm very glad to see we have similar focuses.
@cyphyr I added a 2nd sun with "strength" slightly above 0.01, it work in some way, but i can try a card too.
@WAS There is no blur added yet, but i think is a great idea, i gonna try out (or "try it"?) for sure. and thx for the school sea bass, very useful
@cocateho26 And yes, is very Waterworld inspired by. is incredible but after some quicks search on the web, i couldn't find many images of "underwater cities" out there.