On this page you can find all the files you need to make your own stampers. To do it exactly how we did it, you'll need access to a laser cutter and a 3D printer. Or you could take the shape and make your own things with it.
All files on this page are released under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) licence. If you reuse these files, credit Christian Lawson-Perfect.
There are lots of different ways of making the Spectre shape: you start with the straight-sided "turtle" shape and then just have to replace each edge with something that doesn't have rotational symmetry. I used a sine curve.
Our stampers used this Spectre shape, expanded inwards and outwards to make a 10mm thick outline. The whole thing measures about 500mm along its longest diagonal.
Stamper monotile outline, in SVG format.
You can customise the shape using the OpenSCAD file that generates the shape.
Each stamper is made from four layers of laser cut pieces. Each layer is made of seven individual pieces, each containing two vertices of the Spectre tile.
I've cut the tile up in two ways, so that alternating layers overlap, like brickwork, for strength.
It fits six layers' worth of pieces onto a single 600×400mm sheet of 6mm plywood. The black outlines should be cut and the yellow shapes should be engraved.
You can customise this using the OpenSCAD file that generates the pieces.
The pieces are numbered. One layer is made of even-numbered pieces, and the next is made of odd-numbered pieces.
There are holes at each vertex, for wooden dowels to hold the layers together. I used kebab skewers, with a diameter of roughly 3mm.
To assemble a stamper, build up four layers, applying wood glue between each layer.
The bottom face of the stamper is reinforced with 3D printed bevelled parts. They should be printed with supports, and 25% infill is fine. There's one part for each of the 14 vertices:
You need six of these per stamper.
You need seven of these per stamper.
You need one of these per stamper.
I made some reference diagrams to help with coordinating the tiling:
Also available in SVG format.
Substitution quadrilaterals (PDF)
Also available in SVG format.
This describes how the quadrilaterals at each level fit together to make the next level of the substitution system.
The diagram should be flipped over at each level, so print this on transparency.
Also available in SVG format.
Print at A0 size.