I updated my hexagonal labyrinth sketch to generate a 3D labyrinth and exported it as stl file. Then I printed it on my 3D printer. It took a while to convert the stl file to gcode but finally something printable was generated.
So if you need a labyrinth for your next puzzle or your science experiment with ants or ... download the sketch here, generate a labyrinth, take the stl-file and print it on your makerbot or use it in your mashups.
you can also use the pre-generated stl file I used to print
oculus rift experiment 3 - labyrinth
blender labyrinth generator
3D mushrooms in processing
foggy wood with recursive trees