Yet another Penrose Tile system

Did Thngiverse need another Penrose tile design? Probably not. But this one has the arcs raised, so that you can easily give them a contrasting color with a Sharpie or other marker, and it's written in OpenSCAD, so that you can roll your own variations on it (the raised motifs and the lock shapes are broken out into separate modules for easy configurability).

UPDATED! Now comes with more configuration options for your Penrose-tiling pleasure. One that I'm using extensively is stackability, which carves motif-shaped channels into the bottom so that tiles of the same type can be stored in a stack. Depending on your dimensions, you may or may not need support for this---I'm printing them at 75% scale in the X and Y directions, and I'm not bothering with support.

Another option, which I'm not quite calling ready for prime-time because I lack the patience to test it the way it needs to be tested is subterranean locks. There's now a configuration option in the SCAD to have the locks (b