Exclusive fullscreen aint exclusive fullscreen

[BxdLogic]

So I would like to play this game with DL-DSR resolutions (because every other AA method, except DLSS, sucks) wich is only possible in true or exclusive fullscreen.
There is an in game option that lets you change from windowed borderless to exclusive fullscreen but it doesnt do anything. It stays in windowed borderless after changing it to exclusive fullscreen and applying the changes. I googled this problem but it seems that Im the only one who has to deal with it. I tried a command line argument to force exclusive fullscreen but this doesnt help. Any ideas or work arounds?

[Xeonic]

+1

[Roland]

I've heard a long time ago that DirectX 12 does not support Exclusive Fullscreen.
It's been kinda uncommon to see it in any games for the last several years now.

Why are you not just turning up the resolution in game though?
By default the game tries to run at 4k even when you have a 1080p display.
the aliasing doesn't get any better at higher resolutions though, even if you do use SMAA or FXAA, so none of this will actually solve your issue

And slightly off topic:
DLSS below 4 is about as bad as TAA with the ghosting on fast moving objects, so personally I don't understand calling TAA bad but generally calling DLSS good. Especially when some implementations of DLSS cause massive framerate swings when you move the camera quickly, making it preform worse in those games than traditional AA methods.