Today we had an update for Nvidia GTX 1080 and the problem seems to have disappeared for me.
Yes, thereās an unknow version update in GOG Galaxy as wellā¦ Itās 0.1 MB update, seems like a patch to fix this problem, hopefully 
UPDATE: Itās FIXED, no more psychodelic walls!!! The minor update seems to only update the pak.cfg within Data folder, as it was probably missing some files.
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If you donāt Have an Nvidia would you see it or be effective?
I donāt know what all high/ultra looks like on my LCD screen. not viable for me.