Laser engraving bitwise raster images

The motivation started after reading about Sleator's bitwise image on Knuth's "The Art of Computer Programming, Volume 4, Fascicle 1: Bitwise Tricks & Techniques".

It actually turned out very well!

Added a coat of white paint and repeated... mixed feelings about the result. Two laser passages, the first removing the white paint and the second to get a darker background.

Added two coats of water-varnish on both.

Last try with 3 passages, no paint or varnish on the final result.

Next step: Sierpinski triangles!

And finally a stray running dog.

Need to get some more wood squares blocks!

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(c) Tiago Charters de Azevedo