misha123, I wanted to build a construct that would function like actual deep water. The distance fog setting would not work directionally (in other words, I wanted it only in the water). This setup will allow things to drop into the water and fade away or allow big critters with big teeth to be lurking in the water and come and get ya! This is a really simple example. Zekaric, you're absolutely right about the refraction. I left it out to simplify the experiment. -Kix
-Kix