Fog areas, disable?

[Morten242]

Thanks for the responses. However, it didn't solve my immediate problem; the fog, for some reason, refuses do be deactivated. It's "Active" box in the mapeditor is unchecked, so it shouldn't have been visible in the map, however that is not the case and it's clearly visible whether or not the box is checked.
Has anyone had any previous experience with that and any ideas how to 'fix' it?