Still thinking of business cards. I was looking at moiré patterns and how to generate the layers and cut with laser. I would attribute this image example if I knew source.
Here’s a practical example with explanations and a Processing script to do the coded letter substrate and lined overlay.
http://www.karlddwillis.com/projects/moire-card/
Also I’d nominate Karl D.D. Willis as a perfect candidate for a beta Glowforge. He’s got some chops.