Artifacts on render of Probuilder built 3D obj on iOS 15 but not on iOS 14.7.1 or 14.8

Unity Engine
1

Hello all, we get pixelated/artifacts when 3D objects built with Probuilder (via editor or runtime) render.

It happens for apps built for ios 15 (tested on 15.0.2 and 15.1), URP and for example a spotlight pointing at the 3D object that has a material 100% smooth. There is no problem with ios 14.7.1 or 14.8.

Tested on iphone 12 Pro Max, mini ipad 4, iphone 6. Built on Xcode 13, macOS BigSur 11.6.1 also tested on Monterey 12.0.1 and Unity 2020.3.11f1 and Unity 2021.1.26f1 Color space linear and render pipeline URP.

Snapshot of artifacts here and also in video and images below:

Has anyone come accross this or found a solution? I have raised a bug. The artifacts look really bad so we are holding back publishing our apps until it’s resolved :frowning:

2

Quick update for artifacts found for materials with smoothness > 0.5 when a light points on it, only on iOS 15.x

This affects any 3d object, Unity reproduced the bug, you can vote to resolve it here https://issuetracker.unity3d.com/is…-visible-when-smooth-material-is-lit-by-light