I managed to take some screenshots of the graphical issue that I'm having. It's happening on both my old save from 1.08 and a new game (1.11). I'm still on amd 15.12 crimson but gonna try rolling back to older drivers to see if it's a driver issue.
EDIT 1: I tried 15.7.1 and 15.11.1. The issue is present on 15.11.1 as I expected (since it's pretty much identical to 15.12) but it's not there on 15.7.1. I was gonna try 15.11 but really can't be bothered with the hassle. I will just wait and hope that AMD fix it. I have already submitted a report to them about it.
EDIT 2: I found a temporary fix. It seems that Fallout 4, GTA V and The Witcher 3 are affected by the same driver bug which was introduced in 15.11. In Fallout 4 the compass is glitched out. In GTA V the mini map GPS route flickers. In The Witcher 3 you get these glitches around structures (as pictured). All 3 issues can be fixed by downloading this mod:
http://www.nexusmods.com/fallout4/mods/2707/? and copy/pasting the .dll's into the games directory. I know it says it's for Fallout 4 but it fixes other games too. For FO4/GTA V you can go to "
C:\Program Files (x86)\Steam\steamapps\common\gametitle" and paste them in there. For The Witcher 3 you need to go to and paste them in "
C:\Program Files (x86)\Steam\steamapps\common\The Witcher 3\bin\x64".