Very basic GH 
GH components generally copy geometry. In other words, the holes are cut in a copy of the surface, which can be extruded (in GH) and must be baked to get something useable in Rhino.
Extruded holes:
Baked extruded holes:
Very basic GH
GH components generally copy geometry. In other words, the holes are cut in a copy of the surface, which can be extruded (in GH) and must be baked to get something useable in Rhino.
Extruded holes:
Baked extruded holes:
