Sorry, this is my first post so chances are I'm doing something wrong. But I've been playing Don't Starve for a while now, and I was watching a Youtuber's Don't Starve videos, and the corners of his in game screen are getting darker and darker. I thought it has something to do with insanity, but his sanity was almost full.
Does anyone know what it is? I tried looking it up but I can't find anything, and I'm going crazy trying to find out what it is.