Not sure if this was intended or already reported, but I wanted to bring it up just in case.
Problem: Blacked off area gets cuts off and allows for the map to be revealed. (Doesn't "really" help the players, but looks kind of weird)
Expect Results: While moving around, map will remain dark even if you are at the corner of the map.
Reproduced Instructions: Go to far left of the cave > Map to the left will be 1 quartered revealed
[spoiler=Picture]