A problem while rendering wineglass in Cycles I have been trying to make a wineglass with filling using curves. In Eevee everything displays correctly, but I cannot say the same thing about Cycles. How can I fix this strange effect? I have tried turning curves into meshes, tried using Subdivision Surface, did not help. Any help appreciated.
It's a problem of normals, you need to flip the normals in the Screw modifier: