The ideas used in presenting a pair of spheres can be extended to entire families. In drawing each sphere, it is compared against all the other spheres to determine whether the view of each surface element has been blocked.
By such a scheme, the amount of comparison increases with the square of the number of spheres, so that what is acceptable for tens of spheres may not be acceptable for hundreds of spheres; in that case the introduction of some sort of ordering and horizons would be appropriate.
The calculation of dipole and quadrupole moments for the sphere family will assist in positioning and scaling the drawing for a more effective view.