ToME: the Tales of Maj'Eyal

Is this a bug or a feature? (very very minor issue)

In Amon Sul, in an unlit hallway behind a lit room, it is treating the backside of the wall as lit - that is, from the start of the hall, I can see a wall on one side of the hallway where I shouldn't be able to see a wall yet.

I think the behavior you describe is noticeable in the screenshot relative to this other issue, too: http://forums.te4.org//viewtopic.php?f=42&t=22561