Does anyone know how to implement the irid {} feature in the finish {} block of
a texture?

Or to be more accurate, how do I get iridescence to be visible on a clear
surface?

clipka posted some beautiful bubbles, and I can't seem to achieve anything close
to the transparent but well-defined iridescent pattern that he gets.

I tried adding interior {ior 1.4} but that didn't work (and I get weird
artefacts}

http://news.povray.org/povray.binaries.images/thread/%3C4ed6f24c@news.povray.org%3E/

I looked in the distro, and it appears that we're missing an example scene for
this feature.

- BW

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