Beer Cap Display for Fridge with Mutant Spectre Tiles

The “Spectre” aperiodic mono-tile was devised in 2023 by David Smith, Joseph Samuel Myers, Craig S. Kaplan, and Chaim Goodman-Strauss 

Research paper : https://arxiv.org/pdf/2305.17743 
Further info :  https://cs.uwaterloo.ca/~csk/spectre/ 

The most basic form is a polygon shape, but Smith & co. described how to modify the sides in order to make it truly aperiodic:

By taking this process to a more extreme level, I now made it truly gnarly :

FreeCAD users can see in detail how it was done, using the included source model.

Surely even further improvements are possible, but those are maybe for another time and place… almost time for a beer.

I made the tile profile without any allowance for gaps, so use the offset parameter as required ("Horizontal Expansion" in Cura). 

For economy they can be printed with thin walls and fairly sparse infill, weighing about 4g each.

The tiles can become fridge magnets by placing small magnets underneath the beer caps (see images & diagrams). But blu-tac is a good alternative. Not all tiles need be fixed if they are interlocking snugly.

Finally, Simon Tatham has described how to arrange 4 colours of Spectre tiles :
https://www.chiark.greenend.org.uk/~sgtatham/quasiblog/aperiodic-spectre/