The new 5.3 dispersion settings experimenting

Artwork Blender Tests
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I have been playing with 5.3’s new dispersion and was disappointed that the dispersion scale is clamped to 1 and abbe number 9 – 91 (would be nice to go lower than 9).
It is also clamped if you enter a value node.

I enjoy going over the top like this.

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5.3’s implementation is faster, less noisy and probably more physically accurate than my experimental node group + I did not implement the an abbe number.

But it’s maximum dispersion is…….. Meh
This:

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Which is similar to my nodegroup set to 0.12 dispersion;

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The white bits in my version are reflections from the glass.

I realize these are not “realistic” values but … I think clamping values is mean.
:face_with_raised_eyebrow:

End of rant.

EDIT I was wrong

Thanks to baoyu and NiklasWerth for answering.

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Just crank up the ior and you’ll get crazy like dispersion

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Im cool with a soft-clamp, where the slider stays in a realistic range, but you can crank it up or down way past by typing in values. Sometimes you can discover really cool interesting effects with that sorta free meddling.

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Ahhh …You can lower the abbe with a value, I swear I thought I had tried that.

Yea that works too
:grinning_face:

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I guess my whole rant was wrong, thanks for the answers.

I can now throw my node-group in the bin (although on second thoughts it does can give very different results so I wont yet).

I have edited the thread title to not confuse others.

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Now I have changed the thread title I can carry on posting experiments.

:rofl:

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I am loving it!
:zany_face:

Anyone playing with this new feature feel free to post results.

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I like the images you posted, they look very nice. Also nice answers in the comments :+1:

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Waiiiiiiiit. Does your nodegroup work in EEVEE?

also:

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It does something but not very well (the same goes for the new principled version)

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Monkey on the left principled, right my node group. Not a good example I did this very quickly but you can see that Eevee just gives a hint of dispersion with a lot less sharpness and quality.

I do not really use Eevee much and I think for anything glassy, reflections, dispersion etc Eevee is not the right engine.

Yea no need for a value node you can type in an Un-clamped Abbe number (my rant was unwarranted)

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