Guest shaders may take some time to update the official libretro repo (some times it takes months). If you don’t update manually from his link, you’ll be stuck with that conflict until it’s updated.
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You can get the latest from guest here:
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New update, 12/03/2025
Added new NTSC preset (with few variations) based on guest’s advance ntsc, also included in the uborder main folder and systems specific.
I named it “Zero” for lack of imagination 
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This is my first post. Shaders in the uborder folder will look like this. This screen is displayed in the center, with black bars on the top, bottom, left and right. The bezels are also incorrect. How should I set it? 1920x1080 window full screen. That’s all I did.
integer scale “on” integer scale scaling “underscale” aspect ratio “full”
Shaders that are not uborder will be displayed full screen, including overlays, like the image you posted.
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Hi, welcome to the forum!
To use presets from uborder (and megabezel) folder you will need to set
Integer Scale -> Off
Aspect Ratio -> Full
it should look like this:
If you want to use “normal” presets (not from the “bezel” folder):
Integer Scale -> On
Aspect Ratio -> 4:3
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Thank you for your reply. After I posted, I read the documentation and the settings were written there. However, the shader folder name was written as “Integer Scale”, which confused me.
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yeah, you are right I see how that might be confusing!
that refers to the fact that within the uborder shader the game is displayed in integer scaling.
I’ll probably remove it in the next release…
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Hi m8 I’m currently using your presets on my 1080 monitor… I gotta say … really great work! My only problem is I can never settle on just one preset! 
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Thanks a lot! very happy to hear that!
I do change presets often as well ahah 
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Nice work. I did have issues with the shaders not displaying black as black though, there was a slight glow even in areas that were supposed to not have any. It made my OLED screen look like an LCD as blacks weren’t black. Is there a way to tweak them to get rid of the glow?
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unfortunately I do not own an oled screen so is difficult for me to fix it with no reference 
What you can try is to reduce " Rise Black Level" to some negative values, that should help…
There are many parameters to play around with but as a mentioned i’m in the blind with no reference 