Hacking interference phenomena into your renders

Interference phenomena of light often appear in daily live as, for example, the colorful reflection of oil spills and soap bubbles, the discoloration of tarnished silver and color banding in heat-treated steel. Natively, Blender does not support the rendering of these kind of phenomena.
"Hacking interference phenomena into your renders" by Robert Moerland
Blender Conference 2022
2022-10-28 17:30 at the attic.

[@Kram1032]

Great work!
Once spectral cycles is in, it's gonna be so much easier to do this.
With the old version of the spectral branch (predating Cycles X), I got a very nice thin film effect. The necessary nodes are still somewhat of a mess, but instead of having to do all these calculations for three separate channels, you actually only need to do it for a single generic wavelength at a time, so a lot of vector math would become scalar math instead and such.
The main difference will be, that you put in spectra instead of colors.

[@Octanen_]

Amazing work Robert! Thanks for sharing this

[@vstreet7583]

A great presentation. Absolutely fascinating. Thank you. Dg

[@APerson-jf2md]

Nice presentation and pretty neat nodes!

[@peterlemon1385]

Great presentation thanks for explaining stuff so simply for us =D

[@egretfx]

Wow...clever talk!!!...

[@Limbo_Design]

❤

[@goshawk_fly]

It's needed to write new phisique-correct render engine for Blender!

[@poopiecon1489]

SICK 🔥