@Evgeni_Popov @roland @jeremy-coleman apologies for the delay.
I have not been able to repo this issue in a playground despite setting up what I believed to be the relevant parts of our code. At this moment it’s starting to look more like something todo with our usage of PBRCustomMaterial. If I can confirm in a playground, I’ll post here again but for now all I can say is that there’s some sort of rendering artifact that only shows up on M1 and M2 MPs. It’s really weird, but less generalized than we initially thought. Sorry for the false alert there.