Mirror and Caustics

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denon100
Posts: 22
Joined: Wed Nov 20, 2019 3:37 pm
Location: Germany

Mirror and Caustics

Post by denon100 »

Hi,

why the caustics are not reflected in the mirror again!

Can someone help ?

Thank you
Attachments
Mirrror no Caustics.png
Test Mirror Blender.blend
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Dade
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Posts: 5672
Joined: Mon Dec 04, 2017 8:36 pm
Location: Italy

Re: Mirror and Caustics

Post by Dade »

denon100 wrote: Mon Dec 09, 2019 4:10 pm why the caustics are not reflected in the mirror again!
They are called SDS paths (Specular-Diffuse-Specular) and not even normal bidirectional path tracing can render them. The are very hard to render light paths.

You need to use the under development v2.3 and to enable PhotonGI caustic cache like in this test scene: viewtopic.php?f=5&t=1449&p=18410#p18388 (the under water caustics are SDS paths).
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denon100
Posts: 22
Joined: Wed Nov 20, 2019 3:37 pm
Location: Germany

Re: Mirror and Caustics

Post by denon100 »

Cool, again something learned :) .
Thank you
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