UNITY 5.5 bad quality editor objects

Hello, im having a issue with unity 5.5 i put in my scene a sphere and a plane, but they look like low poly and shadows are in bad quality, (point lights)
i change the quality to fantastic, and i check my video card too but nothing.

when i import a sphere from cinema 4d it looks perfect with no edges… are all the geometry objects from unity in low poly??

Have you solved this problem? I meet this issue and I don’t know how to deal with it@sebastardo