LuxCoreRender Forums

Hi,

Has anyone had success making pearlescent materials/pearls with Luxcorerender?

It seems like the engine would be very naturally suited to this considering the thin film interference feature.

However, I can't find much documentation.

I found this very old breakdown for Luxrender, but the interface/values have changed greatly since then.

https://www.loramel.net/2009/03/materia ... own-pearl/

Help and ideas are appreciated!

josephmcs wrote: ↑Tue Jun 01, 2021 8:09 pm I found this very old breakdown for Luxrender, but the interface/values have changed greatly since then.

Actually, for what I can see, every single material and parameter motioned in the above link is still available.

Thanks. One thing that is confusing me is what the "exp" values are.

For example, the roughness on the glossy material in the old breakdown is set at "exp = 50" whereas in Luxcorerender the roughness is on a scale of 0-1.

Sorry if this is rudimentary and any help is much appreciated.

See the section "Roughness" here for the conversion formula: https://wiki.luxcorerender.org/LuxCoreR ... sy_Coating

Thanks so much for your help.

For anybody interested, I converted the old values into a node tree setup. See attached w/ a sample render, too.

Any input is very welcome of course.

Nice.

And a different go for pearlescent material.

Cool! Thank you.

I put the two of them side by side for a little test if anybody is curious. Mine is on left, yours on right. Nice to see the different approaches together. I think my version of yours could use some tweaking on the noise size, but I like it.

True, depending on the size of geo, noise and volume must be tweaked.
For study I use MaterialX shaderball (.../resources/geometry/) @ 20cm in diameter.