>>533846819
>reshade shader through gamescope directly
Fuck, you're right. Even my older version (3.14.24) supports this. I didn't even notice.
Here's the first working ReShade CRT shader I found (one of the .fx files in https://github.com/frankschoeman/kyubus-shader/releases/tag/v051). I tried one other before this and couldn't get it to work, but I might have just been doing it wrong. I've never used ReShade before, and also, gamescope is very picky; it seems to want the .fx file placed in ~/.local/share/gamescope/reshade/Shaders or /usr/share/gamescope/reshade/Shaders and nowhere else.