Here is a script to create Enneper minimal surfaces.

The nearly identical parametric equations come from:
https://sites.google.com/site/workofap/surface
or http://rhino3.de/_develop/__v3_plugins/math/library.shtml
The rhino math library is kind of like _FxGraph.

Setting the Min Radius to a small value like 0.25 creates a hole in the middle.
The Max Radius can be set a little more than 1.0.

Network works to create a surface, when the radius is 1.0, with the "radial-ish" curves.
Loft works to create a surface, when the radial-ish curves are not present.

- Brian