[GLASS SHADER DISPERSION] Cycles glass shader should have dispersion built-in

[Ace_Dragon]

Dispersion in an RGB-based render engine will always be a hack, it might be better to wait until Smilebags and Penbem complete their work on converting Cycles to spectral rendering.

Thoughts on making Cycles into a spectral renderer

Nice find but this requires measurements at two different angles (one head on, one slightly off), as well as with known polarization. I’m pretty sure that we can’t really do better than taking that formula for n as our estimate. It’s really a matter of degrees of freedom: If you’re looking for two values (per wavelength), you’re gonna need two values (per wavelength) to get them.

Just a thought, have you tried using the white noise node plugged into a color-ramp and into the IOR input, it is surprisingly powerful due to its ability to generate random values?