Enhanced Subpixel Morphological Anti-Aliasing (SMAA) for UE5

Development Rendering
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Hi all,

Based on the prior thread SMAA – Subpixel Morphological Antialiasing integration from 2016, I took a stab at getting SMAA integrated into the current version of the engine. Thank you, Leszek Godlewski, for a reference point to work from.

I’d tried turning it into a plugin, but the subpixel jitter for temporal AA’s doesn’t play nice with SMAA, so that effort became this Pull Request for ue5-main. Alternatively if you want to play with it now, my branch on GitHub should be accessible, but may not build.

I’ve probably broken the reference implementation a little as I found that the gbuffer world normal gives better edge masks than luminance or scene colour, so that’s the default for this implementation.

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Hey, there! Did you go further with this? The github link is dead :smiling_face_with_tear:

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Updated to UE5.4 -UE5.5 here: https://github.com/EpicGames/UnrealEngine/pull/11840

There were multiple bugs fixed and I added the AreaTex and SearchTex textures.

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That’s awesome! I’m not an advanced engine/graphics programmer so I spent weeks trying to figure out how to get it in unreal.

I and others sensitive to temporal blur desperately need other options in Unreal and FXAA is burriest non-temporal AA.

EDIT: I compile from source, I had to replace the AreaTex and SearchTex and also found no way to take off the temporal frame blending from the commit.

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Hi there, how would I be able to clone this?
I can’t seem to find the correct button on Github for it.

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It’s not too hard coping the changes into the current source code.

That’s what I did, but be aware it’s still temporal and the temporal reprojection gets severely corrupted overtime.

I personally had to make edits that prevented it from only running if temporal jitter was enabled.