To make the game look better, but also to add to the immersion, Uncharted 4 will use the technology driving the flashlight effect in “The last of us”.
The director Bruce Straley had this to say on the issue:
“The good thing about the flashlight technology that we already used in The Last of Us is that, even though you’re entering a dark area, it’s not actually dark once you use the flashlight, and this creates a balance of sorts. Whenever we introduce new mechanics, we try to make it as efficient as possible in order to expand the game as a whole.
Small details like that gain importance simply by pointing the flashlight, which makes you feel part of the world.”