IT WORKS!; by cost shadow/lighting

try /SHADOWMAP:0 config option

Nope, i forced steam deck to 1920:1080 and same thing

old:
-maybe must be 1280:800 to reproduce

-checked 9.0-4 with both shadow res. same situation

I've seen it before
it looks like a proton bug
but I can't reproduce it on 9.0-4

Thanks for the patch, but I encountered a strange bug on the steam deck.
After updating the patch (fresh install) and enabling all improvements, picture in picture shows image in 4:3.

https://sp.zhabite.com/sharedfiles/filedetails/?id=3484867312

When I noticed the next day that the game started on low shadow (1024) I changed it to 4096, after that pip started showing a zoomed and shifted image that is unreadable.

https://sp.zhabite.com/sharedfiles/filedetails/?id=3484867201

How can shadow resolution affect pip?

FPS doesn't get fixed for GOG? Everything else seems to work but FPS is still capped at, like, 20
Tried changing all the settings (Disabling AA, running in windowed, lowering the shadow resolution to the lowest, changing the refresh rate to 50, 59 and 60)

I need help to install... can someone help?

because wine/proton by default run an application on builtin DLLs
https://gitlab.winehq.org/wine/wine/-/wikis/Wine-User's-Guide#dll-overrides

Thanks, Heatray! Though, why do Linux users have to put WINEDLLOVERRIDES? The game launches on latest ProtonGE without this override. Is that required?

Thanks a lot, mate. You've made my day