Hardware & Technical 3840x1080 on a 4K display - possible?

Just got a 4k display today, and I was hoping to run E:D in a widescreen mode on it since it's so large (50", but using it on a desk as essentially a "quad monitor" on a single panel). I've tried running it in windowed mode and forcing 3840x1080 resolution in the appdata DisplaySettings.xml file, which seems to work at first - when the game first loads, the window is in the appropriate dimensions. However by the time I get the splash screen, it shrinks it down to whatever it feels an appropriate default is (17something...whatever. It's not right).

Has anyone attempted a widescreen res like this outside of a multimonitor setup?
 
Why 1080?

Why not use the whole display in native resolution?

UHD is a resolution of 3840 pixels × 2160

 
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All you'd need to do most likely is make a custom resolution and make sure the correct GPU scaling option was enabled.

Why 1080?

Why not use the whole display in native resolution?

He wants a wider aspect ratio, probably without the performance hit of using the full UHD resolution then jacking up the vertical FOV to absurd levels.
 
I had tried similar before on a 1920x1200 monitor to give that cinematic feel. I think I did it by creating a custom display resolution in nvidia control panel (assume similar can be done for AMD). It then appears as a selectable option in game.
 
Create a new custom resolution in your graphics card control panel and it should show up in the game menus.
Note that DSR is not compatible with custom resolutions so if you want to use your custom resolution, disable DSR.

I'm using a few custom resolutions, mostly 2560x1080 on my 16:9 display and it works flawlessly when playing in windowed mode.
 
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I tried something similar on my 16:9 4k display, just because I wanted to try out ultrawide (21:9)

I could get the game to run in 4k ultra widescreen (~3840x1640) but while windows was fine with it and it ran at 60Hz, for some reason the game kept locking to 30Hz, even when the refresh rate in settings showed 60. Couldn't get it to stay at 60hz even running borderless windowed, the game would always override windows and drop the refresh down to 30. Gave up in the end.
 
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I tried something similar on my 16:9 4k display, just because I wanted to try out ultrawide (21:9)

I could get the game to run in 4k ultra widescreen (~3840x1640) but while windows was fine with it and it ran at 60Hz, for some reason the game kept locking to 30Hz, even when the refresh rate in settings showed 60. Couldn't get it to stay at 60hz even running borderless windowed, the game would always override windows and drop the refresh down to 30. Gave up in the end.

Did you set the custom resolution to 60hz?
 
Just got a 4k display today, and I was hoping to run E:D in a widescreen mode on it since it's so large (50", but using it on a desk as essentially a "quad monitor" on a single panel). I've tried running it in windowed mode and forcing 3840x1080 resolution in the appdata DisplaySettings.xml file, which seems to work at first - when the game first loads, the window is in the appropriate dimensions. However by the time I get the splash screen, it shrinks it down to whatever it feels an appropriate default is (17something...whatever. It's not right).

Has anyone attempted a widescreen res like this outside of a multimonitor setup?

What hardware you got, Gfx & Screen?
 
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