Cullfog CULLS out geometry from being drawn, so, it reduces the amount of Tiangles being drawn. Now, there is EXPFOG, that does not cull geometry.

The problem you are having with your color, and seeing obejcts far away is a matter of too dense fog, and bad color selection. The denser you get, some objects will be rendered on the screen at far distance, only showing a shadow image. The only way to stop that is.
1. Lower you fog density,
2. Try different RBG colos, that does not leave far distance shadows from objects.

This is trial and error, BE GLAD you can adjust the fog on the fly in the GSC file, rather than haveing to compile each time.