Extruding Polygons from a plane - C4D

[.:iSpawn:.]

Would some graphically smart person please explain how to do just this?

Ive tried creating a plane then deforming it with a formula under it. Then make it editable. Then try to extrude using the points but I am trying to achieve this effect. And I cant seem to get extrusions to appear.

http://browse.deviantart.com/?qh=&secti ... y#/d2x8y17


Thanks if any of that made sense.