Useless Dice 2

by BrianEnigma, published

Useless Dice 2 by BrianEnigma May 13, 2012
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Do you like to play games with dice? Do you find yourself unannoyed with QR codes? Then we have the dice for you! Until you memorize which pattern is which digit, this is guaranteed to require a cameraphone to decode what number you rolled!

This is an update of the original Useless Dice model ( http://www.thingiverse.com/thing:22986 ). Instead of using an image editing program to turn QR code pictures into 2D vectors to extrude (which had extremely bad results), this variant uses a Ruby script to generate the QR code pattern for each face, then writes out OpenSCAD files that build up each face from geometric primitives. For those interested in the messy details, the Ruby script is part of the source zip file.


If you have a single-color printer:

  • Print the core in a light color
  • Get some modeling clay (e.g. Fimo) in a dark color and jam it into the holes
  • Optionally, finish it with something like clear nail polish remover when dry

If you have a dualstruder printer:

  • Load both models, printing the core in a light color and the pips in a dark color

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Hello everyone!

I am just the 3d printing and I'd like to know how to make an impression with two colors.

Thank you!

I'd love to see one with rounded sides, the main shape intersect booleaned with a sphere.

I only managed to print the first few layers before I started getting curl (my problem not yours) so I canceled it and tried to scan what I had so far. It didn't work. I need to calibrate my machine for small parts better.

Yeah, actually the curl happens to be my problem, too (at least, one of them) and, similarly, I was unable to get the code to scan -- I think, not because of the curl, but because of (lack of) adherence to the platform for some of the short runs of plastic. That's probably also the cause of the curl. I think there's just too much detail on the first few layers for the start/stop of dualstrusion.

It could probably be done better with a larger die, but 40mm sides is already pretty hefty. I've considered making a variant with Micro QR Codes, which can be printed much larger and clearer in the same 40mm^2 surface area, though I have yet to find an iPhone app that understands those.

Can you post the 6 sides in dxf for us 3D challanged guys with Laser Engravers...???


This version doesn't use vector artwork, but instead builds up groups of cubes in the QR Code pattern. What you want is the previous version from which this was derived (at http://www.thingiverse.com/thing:22986http://www.thingiverse.com/thi... ). It has a source ZIP file with all of the original QR code artwork in various formats (PNG, EPS, DXF).

Useless Dice

This would be cool for a dice based augmented reality game.