Hmm, it never happens when i'm playing but when i'm watching a match it does this. But thank you mr Evil i appreciate your kindness ;3Sounds like a dynamic contrast setting on your TV or monitor actually. The game doesn't have any setting that would cause that.
It could be a screen saver setting on your console. If you don't press anything for a while it will dim the screen.Hmm, it never happens when i'm playing but when i'm watching a match it does this. But thank you mr Evil i appreciate your kindness ;3