OK, I think I see what you mean now (those other screenshots were too hard to look at). In front of your character, a sort of... square of different wall?
Mine sometimes does that when I first enter an area (mainly in Skyhold, with all the people and junk to load), but it 'fixes' (there's a better way to put it... my brain just won't tell me) itself bit by bit after a few seconds, I'm guessing yours isn't doing that? Have you ever fallen through the floor in Skyhold? Often happens running from the main hall into Solas' area when you don't give the game enough time to load everything.
I think the dxdiag will help, might want to include what game graphics settings you're using, too.