CymTyr: Sorry I just now got back to GOG. I think the super sampling has already been explained, so I won't repeat it.
Whether or not the average person can see the difference? I definitely do see a difference between 1080p and 1440p but it's small. When I game at 4k, it looks amazingly detailed. It also helps I have a monitor designed to work with AMD cards, though it caps out at 72fps. It's nothing crazy :) It's also worth noting when I set super resolution, I can change my desktop resolution to up to 4k if I want. I just choose not to because the pixels on the 1080p monitor make everything REALLY small if I don't have a game open.
-Sim
CymTyr: I realized this might be what you meant after you posted and I responded, but it was too late to change it and I try not to ninja delete stuff these days.
Thanks for explaining :)
-Cym
It's something similar to watching native Youtube videos and 4K-downscaled ones on 1080p display: the 4K downscaled look better than the native ones.
It is a edge case since there is a sh*tload of conpression involved in YT videos but the principle is basically the same.
As I said earlier something similar has been used since forever in 2D graphics: when you need to upscale an image much is customary and advised to re-sample it first and then upscale it, this way the scaling algorithm can work on a greater number of image elements.
In the case of VSR/DSR you get the best results by downsampling a much higher resolution image usually and forcibly 4K.
VSR and DSR are really simple things with fancy names that have nothing to do with 3D rendering, I'll just leave it there ;)