So I had an extreme issue with vertical lines, trails on movement and other artifacts on loading a save game (any save game) but not on a new game. I had done everything that has been suggested (lowering graphics settings, clearing cache, updating graphics drivers, validating the game files even reinstalling the game) and this didn't start until I hit 300 hours of game play. On starting a new game (again) I noticed that some items I had bought in a previous save showed as being added to my...

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