2 comments
Related, "abrasion holography", with <i>great</i> good success for being hand drawn: <a href="http://amasci.com/amateur/holo1.html" rel="nofollow">http://amasci.com/amateur/holo1.html</a> (1995)<p>Maybe could swap out the pen for a needle?
This is "old Internet" style fun territory (along the same lines as the Tom7 fun, if not quite as deep). I felt that the olive oil + fingerprint + phone screen was a really nice way to illustrate the core concept. Especially clever because it used something common and annoying to help describe how the plotter does its thing.