About 10 years ago, when I learned about the EURion Constellation[1], I made a T-shirt with the pattern on it. It sort-of worked - a photo taken at the right distance would frequently cause a copy machine to refuse to copy it. It was twitchy, though.
At the time, I was thinking of posing for my DMV photo with it on, because I thought it was interesting and kinda funny. Failed to do so and never resumed the experiment.
At the time, I was thinking of posing for my DMV photo with it on, because I thought it was interesting and kinda funny. Failed to do so and never resumed the experiment.
[1] https://en.wikipedia.org/wiki/EURion_constellation