GenerateSurfaceNormals does not work for sphere
GenerateSurfaceNormals has some issues when applied to a default sphere. I tried this on 5.8.1, 5.9 and master and they work the same. The left image shows the sphere with Normals generated by GenerateSurfaceNormals, the right image shows the sphere with Normals generated by the SphereSource. The two views are linked. Also attached is the state file that creates this image.