Why is there color banding in GuildWars 2?

amogachi44

Honorable
Nov 1, 2012
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10,680
I'm having this issue in Guildwars 2 but now the same thing is happeining in Borderlands 2 but not just underwater.

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Those 'waves' or corna like effect is stuck to my screen underwater. So as I move it just stays there, doesn't change at all.

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It also look like an oval on its side if that helps. When playing its very visable and annoying.

I noticed when I open steam and go to 'games' that there is horizontal color banding. Now this doesn't appear on all black images just randomly but after restarting my computer it hasn't gone away. Thoughts?