Yay I made a plugin. This makes a sphere-shaped void. It is a 3D analog to hole. I learned how to convert from spherical to rectangular coordinates to make this.
The zip includes the plugin, source, readme, example pic and params, and the license.
Thanks - very cool! Having troouble though - (feeling lame) - I downloaded .zip file, read your notes, etc. - I don't seem to have a "Plugins" folder to drop the .dll into? Basically I only have a _3Dhack.exe file...hmmm, weird. Any ideas? Maybe I downloaded and installed wrong a long time ago - it has worked fine but... Thanks for any tips on figuring this out.