Attached Link: help had arrived...

nevermind.

 there is a prop in freebies here(sorry i forget who by), that is like a square but curved,so front on it looks square, but side on it looks curved. this prop can be used to make "low lying fog", it is a great prop as you can adjust the transparency to suit you needs,place it in front of your scene, and/or character.

here is link to a picture i did using it.