playing with caustics

Post your tests, experiments and unfinished renderings here.
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epilectrolytics
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Re: playing with caustics

Post by epilectrolytics » Sun Jun 23, 2019 4:21 pm

provisory wrote:
Sun Jun 23, 2019 2:40 pm
Have you experimented with PGI caustic cache and volumes? I mean the light rays in the fog/smoke type? I can't get good results.
Thanks!

I have not yet tested caustic cache with scattering volumes.
OIDN does not work well with scattering yet, so I do this kind of work still in Cycles.

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Re: playing with caustics

Post by provisory » Sun Jun 23, 2019 6:01 pm

epilectrolytics wrote:
Sun Jun 23, 2019 4:21 pm
I have not yet tested caustic cache with scattering volumes.
OIDN does not work well with scattering yet, so I do this kind of work still in Cycles.
OIDN works perfectly for me with scattering volumes and BiDir.

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epilectrolytics
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Re: playing with caustics

Post by epilectrolytics » Sun Jun 23, 2019 6:44 pm

I think I have not tested this combination either :oops:
My experience, in architectural settings with PathOCL is like what @FarbigeWelt describes here.

Once the current caustics craze is over, I will investigate the OIDN-with-volumes topic further :D

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epilectrolytics
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Psor Prism

Post by epilectrolytics » Sat Jun 29, 2019 8:03 pm

First attempt at the iconic cubo prism with hybrid path.
I didn't want to render longer than a day and chose 500 samples/frame which was probably no good idea because there is some visible noise from fireflies, also because OIDN was at 70%.
300 frames in 24h on Ryzen 2700X + RTX 2070.

Glass material is 80% dispersion + 20% roughness, a big and a small point light at the same location for lighting, no background.
In order to make looping possible after a 180° turn I had to mirror the ground plane material and even to remodel the prism which was not 100% symmetric causing a shift in caustic patterns between 0° and 180° :o

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Re: playing with caustics

Post by provisory » Sat Jun 29, 2019 8:16 pm

Nice!

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B.Y.O.B.
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Re: playing with caustics

Post by B.Y.O.B. » Sat Jun 29, 2019 10:28 pm

Awesome :)

Racleborg
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Re: playing with caustics

Post by Racleborg » Sun Jun 30, 2019 6:57 am

Looks really nice! :)

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epilectrolytics
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Re: playing with caustics

Post by epilectrolytics » Sun Jun 30, 2019 12:30 pm

:D

Thanks!

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Re: playing with caustics

Post by CodeHD » Sun Jun 30, 2019 12:46 pm

I watched it a couple of times now, and if there is any residual firefly noise, then I can tell you it is not noticable to someone who doesn't know where to look for it ;)

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epilectrolytics
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Re: playing with caustics

Post by epilectrolytics » Sun Jun 30, 2019 1:03 pm

You're right, the noise is visible in the image files and the Apple ProRes 422HQ master clip, but with the h.265 compression for the uploaded file it is mostly smoothed out.
0196.png

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