Somewhat-related... I just found out about "structural" coloration[1], which is "production of color by microscopically structured surfaces fine enough to interfere with visible light".
It took Lexus ~15 years to develop "structural blue", a colorless paint that creates blue light using this structural interference. The making-of video[2] is pretty amazing, and definitely worth watching.
After learning about light interference creating the iridescence of butterflies and of CDs, I wondered whether you could burn a CD to control the structure of the CD to change that interference enough to, say, draw an iridescent image. However, it looks like the writeable elements of a CD are a too large. With a Bluray though, it might be possible... I haven't tried and I'm not entirely sure how you'd go about doing it.
Came here looking to see if someone had already posted about this. Not surprised someone else was aware of it.
This is absolutely worth a read, and the less than 5 minutes to watch the video.
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I'm not sure what the "Structural Blue Edition" cost (my guess is the range of $10K - $30K premium), but it's still far from the most expensive car paint jobs -- Porsche's "Liquid Metal Silver" for the 918 Spyder (created by BASF) was a $64,000 option (where the aluminum flakes arrange themselves in a specific way during application), yet there's been crazier stuff offered than that.
"Makes you wonder if a structural red could be created. I would guess not, otherwise it would exist in nature"
Moonstone sometimes exhibits red-orange coloration due to its structure of alternating layers of different types of feldspar. Opals do the same thing but by water-filled fractures inside a group of quartz spheres. We can synthesize both so making a structural red should not be difficult.
It took Lexus ~15 years to develop "structural blue", a colorless paint that creates blue light using this structural interference. The making-of video[2] is pretty amazing, and definitely worth watching.
[1] https://en.wikipedia.org/wiki/Structural_coloration
[2] https://www.youtube.com/watch?v=9JU541_zm2w