Every scene, every material, everything always has these weird light rays on it UNLESS I SET ROUGHNESS TO 2.0 - vertical dark lines in 4k render How can i stop this??? what causes this?

[joelbenjamin]

I had to do it in the materials themselves. If you’re being pretty disciplined about making Master Materials and creating instances, it’s less of a big deal, but for my scenes, there was primarily one material that had this “Venetian blinds” issue. There may be another way to do it more universally in project settings

I’ve just added it to my list of things I hope gets fixed in the next version!