faking dispersion using the new blend material

[Gijs]

You can now create a Vray material for rendering dispersion. Notice the additive mode, which in this case should be physically acceptable.



Using this material on a 'diamond shaped' object: (some glows and stars from photoshop) The small change in ior gives a subtle color change in the material.

[ene.xis]

wow!
great result u got there!

must try one of this days dispersin just for fun...i dont get to need it so often (never is what i need to say...) in these archiviz...

[jujubee]

Wow Gijs - that's amazing.

[cpnichols]

Gijs....if you take it out of Shellac mode, you will not need to do 255/3... you can just do 255, because it will disolve them together.

[Morbid Angel]

Maybe another render? this one doesnt show dispresion very well.

[Gijs]

Chris, I'll check that, thanks.

Morbid Angel, well, it is like I said, a subtle effect. You can easily change it by increasing the differences in IOR's.

BTW I also tried to come up with a 6 color blend, but somehow this failed miserably.

[natty]

Looks pretty cool but not much colour dispersion Gijs, seems most of the colour is coming from an hdri?

[Morbid Angel]

yeah, need something like this

[studioDIM]

another thumbs up to chaos for sneaking in these "silly" small things, which make a huge difference in the right hands
I was SO frustrated by max trying to recreate it

Lele

[DaForce]

sweeeeeeeeeeeeeeeeeeet!!!

[jacksc02]

morbid, is that a render?

[Morbid Angel]

indeed, and its final rendered render... With some post process i think. Took it of of their website.

[jacksc02]

ahhhh sneaky

[studioDIM]

5 as reflection/refraction max depth is too low to see any diffraction.
Especially with "reflect on back side" on, rays would be trapped in, and show the BG.
In my tests 15 is a good dept to improve the diffraction presence without changing IoR spread.
And maybe lower a bit refraction cutoff to let the softer tones come through (0.003 or similar?)

Also, i found it best to avoid very bright light sources, as when diffraction occurs, the rays are fairly energetic and tend to show colorful, and meaningless, speckles around the object, making it hell for the AA to clean it.

Lele

[Sawyer]

Hows that? Rather stupid model but...