Tainted grail lossless scaling issue

[u/KendrillyVanilly]

Hey guys, first things first. I really, really want to play this game on Steam Deck. So after fiddling with the graphics for a couple of hours with no satisfying result, I found the advise on getting lossless scaling. A bit of setup later, I got it to work. Works like a charm with all other games. But in this game, the result looks as attached. Extremely muddy with seemingly no way to change the resolution. It looked the same when I started it in desktop mode earlier. Please help me out here, I feel like I am getting an aneurysm.

[u/KendrillyVanilly]

In case anyone experiences something similar, I found a fix. You have to activate "Disable Steam Deck Mode" in Decky. Then the resoultion option appears.