Lithopanes are never gonna give you up.

Customized version of http://www.thingiverse.com/thing:74322

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=74322

Step 1: Print at 0.2 layer height, 1 shell
Step 2: Give to someone and while they're confused tell them to hold it up to a light
Step 3: ...
Step 4: LITHOROLL'd

Using the following options:

layer_height = 0.2
number_of_layers = 12
hole_diameter = 10
image_file = lithopane20130416-17926-4toszu-0.dat