I can see artifacts on my sword and on another models, even on models that is not mine. I would think that it is because we do some thing wrong with settings but here is one strange thing… When I open 3d setings it looks good. Here is screenshots of 3d viewer in common mode and in 3d settings mode.
And that is a link on this model. https://sketchfab.com/models/d763bf37ddbd413690b75c6efd289ec0
May be it is only in my browser… Please say if you see it different.