Cheats: Altered Maps
Bam4
Virtually all of the coloured wall tiles in this map have been removed, allowing many areas where cheaters are able to see through from one room into others.

Click an image for a closer look.
 

As you can see in this image, the water between the two bases has been removed. The fullbright also removes the many shadowed hiding places for snipers in this outside area.
Entering the enemy base, the coloured wall tiles have been removed, so that cheaters are able to see through the walls into the ramp room from the entrance area. Likewise, a defending cheater is able to see enemies entering this way from the ramps.
This shot shows the view from the ramp room area looking out to the entrance through the wall.
In the grenade resupply room (as well as the other ammo and health resupply) the coloured tiles have again been removed, allowing cheaters to see enemies hiding or restocking inside.
At the sniper balcony the edge walls have been removed in a similar way to the 2fort5 map hack.
Looking down the lift shaft, we can see that the removal of the central wall segment reveals a little of the area below. If you move around at the top of the lift it is easy to see any defenders waiting below.
In the flagroom little has been done to the map apart from the further removal of wall tiles, which makes little difference. The only other change is the removal of the secret passage door, as with all the other doors in the map.
At the bottom of the spiral, several wall segments have been deleted, allowing cheating defenders to see through to the spiral, and any enemies incoming from there.