I see, but I am controling when I show or hide the meshes. Whenever I crss a tile border, I show the 9 tiles that the tile you are on touch. Therefore I am not sure how to use fog when the tiles are mostly within the range of the camera to begin with. Another thought I had was to increase the number of tiles around the camera to 25 instead of 9, but that will probably add a huge amount of polys to the rendering process..
Jamie
Jamie