Hi,
in this Reddit topic, I've found a very nice way to fix artifact.
https://www.reddit.com/r/Unity3D/comments/fxkm7i/im_very_pleased_with_how_i_was_able_to_fix/
In this scenario, you can't use texture mipmapping features because there is a lot of geometry. When the artifacts are in the background you can avoid the issue using a physical camera with target and DOF enabled. If the artifacts are in the foreground, like a stainless steel mesh grille, it could be a lot trickier to remove artifacts.