This looks awesome! I love the look of this box so much.
Unfortunately, I can't quite get the code to work! Is there any intrinsic size limitation to the document (pagesize or something)? I tried to make a 24" x 24" x 24" box pattern, and it's cutting it off at the edges. Maximum pagesize limit of some kind?
Tried using gv to view directly, ps2pdf followed by evince to view, evince to view ps file directly, and inkscape. ps2pdf + evince was the closest to working.