Setup of a special material and emission situation

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lighting_freak
Posts: 214
Joined: Thu Jan 18, 2018 6:02 pm

Setup of a special material and emission situation

Post by lighting_freak » Thu Oct 08, 2020 1:27 pm

Hello all,

I'd like to create a special material combination.
It is a special red acrylic that allows also a special yellow light to come through it and still looking yellow.

The following image shows the absorption of the red acrylic and the spectrum of the light source.
Material_VS_Emssion.jpg
Is it possibel to model this situation in luxcorerender?
Thank you.

BR.
OS - Windows 7 X64
CPU - Intel CORE i7
GPU1 - Variants of notebook card from nVidia
GPU2 - Variants of notebook onboard card from Intel
Lux - Latest possible relaease

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MetinSeven
Posts: 120
Joined: Sun Aug 18, 2019 10:19 am
Location: Netherlands
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Re: Setup of a special material and emission situation

Post by MetinSeven » Mon Oct 19, 2020 5:31 am

Specialized materials like this could probably benefit from a spectral workflow. I hope the LuxcoreRender devs put it back on their list.
visualizer • illustrator • animator • 3D designer — metinseven.nl

CodeHD
Posts: 396
Joined: Tue Dec 11, 2018 12:38 pm
Location: Germany

Re: Setup of a special material and emission situation

Post by CodeHD » Mon Oct 19, 2020 7:29 am

I don't think it is possible now. In RGB space, the yellow light must be composed of similar parts R and G, while a red-looking filter must filter out almost all G... hence ending up with a red light after transmission.

There was a nice example on discord recently where someone passed the dispered spectrum from a prism through a red filter, leading to pruple becoming red.
Attachments
purpspec.PNG

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