As a picture often speaks better than words, here are the two images of my problem. I'm trying to get a smooth render on this object. I tried many options but no way I always have these artifacts. Is it possible to have a smooth rendering with a convex surface? [![enter image description here][1]][1]


[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/Ierts.jpg
  [2]: https://i.sstatic.net/EJaTu.jpg