I would love to see this as well. I use a native 4k monitor (LG CX) with a 1070 Ti, so as you might expect, I don’t exactly get the best performance. In performance heavy games I make use of internal resolution sliders (and even better, dynamic resolution if supported), but of course not every game has those options (most don’t actually). So if I want a lower resolution, that only leaves a literal lower resolution, which of course has lower quality HUD but also is generally lower quality overall compared to “normal” temporal upscaling (speaking of which, while i’m sure it’s impossible for some reason that I don’t realize, wouldn’t it be great if Special K could actually add in TAA support for the games that don’t have it? It has access to all of the buffers that it needs right?) that most games with a resolution slider use (plus a bit of injected sharpening, even better if the game has native sharpening). So having Special K able to edit the internal resolution would be absolutely amazing for the games that don’t support it (or don’t have a hack/mod for it). Even editing the internal resolution without affecting the window resolution would be better than actually changing the entire desktop resolution for the game (specifically, for a better looking cursor, more consistent mouse sensitivity, etc.)
I think this same discussion came up when talking about isolating and adjusting the brightness of HUD in HDR games. Yes, it takes a lot of manual work, but having community profiles, so that people who do the work can share, as well as more accessible controls within the UI (not just a plug and play system, but also not having to edit the source code), I think would be the best solution. Of course I didn’t make this app, so i’m sure there is a lot of stuff I am not understanding here.