What might cause this graphic issue on Steam deck Duckstation and how to fix it?

Numubunde

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Hi everyone. For a couple months now I've been the proud owner of a Steam deck, and I immediately installed Emudeck and one of the emulators I use is Duckstation for PSX. I just look at the graphic settings I have on my pc (set with the idea of making it look as similar to the original PSX looks on a CRT screen) and had it the same way on the Steam deck. However, it seems even though those settings look good on my pc, it's not the same with my Steam deck. Here's a couple screenshots so you can see the issue.
WhatsApp Image 2025-10-13 at 00.27.25.jpeg
WhatsApp Image 2025-10-13 at 00.27.01.jpeg

(Azure Dreams and Dynasty Warriors)

As you can see, in Azure Dreams you kinda have a bigger FOV than you're supposed to, so the black area out of map can be seen. In Dynasty Warriors, the image is just like very blurry?

Yeah, as you can see, I'm really uneducated about the technical details of graphical settings, so I apologize if I'm not being clear or if I'm not including important info. If needed, I can give more details about my settings. I would appreciate it if you could help me fix this :)
 
Solution
I think you have different problems there.

The first image is probably like that because you may be using a widescreen setting on the emulator, and since PS1 games were originally intended for square-like TV screens of the time, that part of the game was actually hidden. Try deactivating the "widescreen" setting on Duckstation Graphics options.

The second one seems caused by interlacing?
Try changing the setting that says "Deinterlacing" on Graphics settings to Adaptive or Progressive.
i dunno but i would just put the settings back to default on the steam deck's duckstation if it looks like that
I second this. If it doesn't work then go to the settings menu->graphics and turn the PGXP geometry correction off. See what happens and report back to us.
 
I think you have different problems there.

The first image is probably like that because you may be using a widescreen setting on the emulator, and since PS1 games were originally intended for square-like TV screens of the time, that part of the game was actually hidden. Try deactivating the "widescreen" setting on Duckstation Graphics options.

The second one seems caused by interlacing?
Try changing the setting that says "Deinterlacing" on Graphics settings to Adaptive or Progressive.
 
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