I’m having the same or a similar problem in version 4.15. Assets that worked fine in previous versions have this flickering now. It is not z fighting. There is no doubled up face or any other face near by. I could reduce or eliminate the problem in another mesh (table legs) by adding edges near the end of the long face.
I have carried some of these meshes through various versions and they always rendered fine. it seem to happen with long and thin faces now. Is there an engine change that might have caused this? - I also haven’t tried 4.16 yet.
Here is an example. The black flickering face is long and thin. There is definitely no other face overlapping or close by. (ignore the weird faces near the camera. I am clipping through another mesh)
