If you're interested in trying to use my files they can be found here.
I replaced the main game files, not the update folder. Would be wise to backup anything you mean to replace.
This happens on every resolution and even on native resolution, it doesn't have anything to do with shaders or the nvidia drivers as far as i can see, just a guess but i think the game simply loads too many LOD assets for cemu to handle atm. It probably just can't find the correct texture fast enough from time to time or there is some kind of limit to it, the pink/lilac textures are just how the untextured normal maps look like (https://www.filterforge.com/filters/1160-normal.html). Exzap probably would need to take a look at this but i guess it's way down the priority list.