Noise/dithering visual artifact on metallic materials

[short torrent]

I'm having this problem with metallic materials. There's this grainy noise effect on metallic objects that shifts when the camera moves angle. Any idea on how to fix it?

[harsh cypress]

Did the material have render face: both?

[short torrent]

No, just front

[harsh cypress]

I believe the artifact is from SSAO
It doesn't usually appear on flat surfaces, but I suspected inverted normals could've been related

I would toggle SSAO off to see if that confirms it, and then try to tweak its settings and compare types of materials and meshes where it happens, if you need SSAO

[short torrent]

Where may I find that option?

[harsh cypress]

The active Quality level's associated URP Asset's associated Renderer asset

[short torrent]

I don't see that option

[harsh cypress]

Where are you looking for it

[harsh cypress]

That's the URP asset
You see its associated Renderer at the topmost field

[short torrent]

Ooh ok. Yeah, disabling it fixed it.

Setting to intervaleted gradient method works fixes it too

I wonder if the problem is related with how much the material reflects stuff?

I don't think it should reflect thaaat much

Even with smoothness set to 0 it reflects a lot

[harsh cypress]

Seems likely
Lit (PBR) materials are supposed to become more reflective at glancing viewing angles (or normals, technically)
But that is more than glancing, as the reflected color goes into totally solid gray

Which to me suggests the normals are bending more than 90° away from the camera
That can happen with angular meshes which are smooth shaded

[short torrent]

Can I do something about it?

It seems like I'm not the only one that has encountered this problem https://discussions.unity.com/t/new-ssao-method-blue-noise-artifacts/890543

Thank you tho

[harsh cypress]

You can make sure the asset has good vertex normals and/or normal maps, and improve them if they're causing distortion

[harsh cypress]

I see these extreme SSAO artifacts pretty regularly, but not personally so I have never been able to test to determine what causes it
Seems like only some users encounter it