I recently downloaded it from GOG and tried to play it on a 5K studio display. I wasn't able to get a result that did not blur those beautiful pixels, which is such a shame. Yes, I did go into all those setting menus.
You have to find a way to set your display letterboxed to a resolution that is a direct multiple of whatever the game plays at.
You have to find a way to set your display letterboxed to a resolution that is a direct multiple of whatever the game plays at.