The source of light for the head torch is high above the player. As a result, walking through some portals casts strange shadows and lighting rooms with low ceilings does not work.
Ignore the brightness. NVidia ShadowPlay always records much brighter than it appears in game.
Server: DayZ US Southwest 0-3 (Experimental/Unstable)
Time: 13:00 PST November 9, 2018