   under water effect
  hi all ,i have a simple water implementation with reflection for above and refraction for belowcurrenty when the camera goes under water , i see the floor beneath the water rendering quad,I am not looking for advanced solution like SSS , but I would like to ask youwhat kind of quick things could be done to make it look like under water ?   
  Not sure how quick any of these will be to implement, but caustic lighting if you're in shallow water and strong fog are probably two good things to look at. Maybe also crepuscular rays, though that could take a bit of work to get right.   