A video titled “Creating naturally-fluctuated patterns using a 3D printer” was submitted to YouTube. The URL is http://youtu.be/IJ15ysJR5l8
Information on this technology will be available as a paper:
Yasusi Kanada, “3D Printing and Simulation of Naturally-Randomized Cellular-Automata”, 19th International Symposium on Artificial Life and Robotics (AROB 2014), 2014-1.
However, currently, information is only available in Japanese:
“3D プリンタがつくりだす，セル・オートマトン風のパターン”
Another video on "natural-direction 3D printing" will be submitted soon.