OACMPDM9 - Buggy fog

[The-Gig]

Tested version 230430.

As you can see in these screenshots, the fog is buggy: it causes glitches as you move around, and still shows the bottom of the map as a pitch black square.
Unfortunately, id software didn't refine too much some features. I fear the fog is only meant to be used in enclosed spaces, it doesn't cope well with skies.
I don't know if there some trick to avoid the problem, or the fog has to be removed altogether...

Here, moving the view just a little causes the border of the map to glitch:

And here you can see that looking at the bottom of the map shows a pitch black square:

Note: about the "arena is too dark outside the playable area" there is its own issue: #19