Mapping lingo, its basically the distance before stuff starts redering.
On a side note, I have been doing some more optimization to the map, and the good news is, it seems I can save the map from the chop block.
Untill adding the Z Clip Pane, and a few other fixes, I had feared this map would have to be canned.
I am also following some tips from Metroid on lightingas well. You should see the lighting on his new map for TBU, pretty sweet stuff.
Any rate, look for a update for this map pretty soon.
Oh, one last thing, I will be leaving the dynamic weather on this map, so there will be rain from time to time.