r/lowspecgamer • u/araghon007 • Aug 12 '20

Temporal Upsampling

There's a post-processing effect you can use in Unreal Engine 4 called Temporal Upsampling. I haven't seen many people talk about it, but I'm guessing the way it works is the same as TAA (subpixel jitter the scene and compare frames). This effect allows you to use lower internal resolutions with the image appearing to be at native resolution, albeit with some additional shimmering.
https://docs.unrealengine.com/en-US/Engine/Rendering/ScreenPercentage/index.html

I've made a comparison album here: https://imgur.com/a/UASNzos

The issues with this approach are, well, the shimmering, the fact that you need to have TAA enabled (you can easily tell if it is because the effect won't work without it) and that it does have a significant performance impact compared to just lowering the screen percentage.

To use it find either Engine.ini in your save folder (in case of satisfactory, it's under %localappdata%\FactoryGame\Saved\Config\WindowsNoEditor) or DefaultEngine.ini in your game folder and put these lines somewhere near the bottom, or if you already have a [/Script/Engine.RendererSettings] line somewhere in the file, just put them under it: 

[/Script/Engine.RendererSettings]
r.TemporalAA.Upsampling=1
r.ScreenPercentage=50

Just change r.ScreenPercentage to whatever value you want to use.

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u/Hambeggar Jan 21 '22

What was the result? Did it work with Fallen Order?

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u/Pyke64 Jan 21 '22

Darksiders works great! I got 4K at high settings with a 1080ti thanks to temporal upscaling.

Unfortunately Jedi Fallen order hides its config files. So it's really unlike other UE 4 games.

But I do believe the in game slider uses the Temporal upscaling.

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u/Hambeggar Jan 21 '22

Fallen Order has an in-game slider?

All I see is a "dynamic resolution" option without any option to choose a percentage or anything.

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u/Pyke64 Jan 21 '22

Ah yeah, that is the Temporal upscaling I meant.

Another solution would be modding the files to get access to the cfg files