creating a grid of hexagons within a quad surface
John Leung made a tutorial on how to mkae a hexagon grid on a quaqd surface in GC. Not a completlely filled surface but the project shows as well a way to fabrication
http://crida.net/abp/dda/Project_2/John_Leung.pdf
more GC tutorials on morphcode
these russian friends have put some interesting tutorials for GC online. Including weaves and trees.
http://morphocode.com/lab/