first of all, thank you for these detailed instructions, with NPI and AA on, the game is really looking sharp

I have a small issue however, I'm sure I followed step-by-step the guide and also tried to recreate the NPI profile from the scratch several times, but unfortunatly it seems that the small mirror (on top of the big one - I am a left hand driver) on the left side of my truck (ETS2 - Scania, but alse checked with other brands on the truck dealership), doesn't seems to have AA on: the resolution is bad, like it is set at 50% of the native resolution with blocky pictures. I made sure many times that mirror resolution is set to medium (checked ingame and on config file), however no dice.
The big mirror still on the left side, has AA on, seems also that AA is applied on both right side mirrors (small and big). Don't understand why only this small mirror is acting weird.
With ATS, while I did not tested extensively, it seems that all mirrors are fine with AA applied.
Just to give you some more details, I'm running ETS2/ATS in a triple screen setup (using the Multimon file "Triple Monitor AA setup with reduced left/right monitor angles config V5 [angle I'm using is 22.5°]" adjusting only the bezel correction - no other changes to the file).
Resolution is 7680x1440 (3x 2560x1440 144hz 27" monitors)
Ryzen 9 5950x
32GB DDR-4 3200MHz
ZOTAC GAMING GeForce RTX 3080 Ti AMP Holo
1TB Samsung Nvme Drive (3000+MB/s read and write).
As I have a capable/powerhouse pc to run on my resolution at steady 60 fps, I don't want to waste unecessary GPU watts (with 4x AA it is drawing 330Watts+) for not life-changing improvements; so I set the AA as
2x [2x Multisampling]
2x Sparse Grid Supersampling
and locked the framerate to 60FPS.
With that I'm reaching ~180watts-220watts of GPU power draw while keeping the smooth 60 fps.
If I will increase the AA to 4x, it seems that the small left mirror resolution is getting better and probably AA is applied, but if anybody has the willing to reduce AA to 2x and give it a try, just let me know if you're incurring the in same issue as me.
I'm unable produce screenshots/pictures at this very moment, but will do this evening as soon as I'm a home.
Thanks,
Ilg.