<p dir="ltr">Back in the day (1992 - yikes!) I wrote programs that started with an icosahedron and recursively divided each triangular face into four subtriangles and so on to lay a close to regular mesh over a sphere to arbitrary resolution. [The I solved simple pdes using a finite element method, but I digress :-) ]</p>
<p dir="ltr">Perhaps icosahedrons would suffice as sufficiently spherical plot markers?</p>
<p dir="ltr">Dan</p>