I have completed my hallway. It kind of reminds me of counter strike 1.6 somehow. It turned out ok, I guess.
I like the last version.
The first one is too high, like camera view.
The second to low, like crawling on the floor.
A great corridor.
Perhaps, mostly in the last human eye view there should be regular spaced ceiling lights all along even if they are out/broken to maintain the gloom?