Can anyone give me a short short intro to why games uses FOG?


- Is it because it is suppoesd to hide the objects far away, so it should render faster (don't think thats why)

- Or is it to hide the objects that you don't render far away due to space partitioning?

- Or is it to make it more "real" looking?

- Or is it simpley to ad fog to the terrain, if there is fog in the air...???

- Or is it any other reason?