Same as in Fig. 2, but the height levels are spheres. The heights are again 1.0R_⊙, 1.5R_⊙, 2.0R_⊙, and 2.5R_⊙. The dashed line in the first row depicts the source surface, which here is not the same as the uppermost height level examined. The uppermost levels exhibit open field structures in the ellipsoidal cases because the sphere of 2.5R_⊙ is partially within the source surface and touches it at the equator (prolate case) or the poles (oblate case).