Unfortunatly, I don't think there's a strategy to do this; it just happens randomly. I was wondering around Snowy Mountain when all of a suddenthings got darker. I went down to the volcano area to see what it looked like. Dying thumb|300px|right|Notice how thing temporarily turn back to normal when I look through the binocularswon't turn it off, so if it does happen to you, I wouldn't recommend saving the game.