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Re: playing with caustics

Posted: Sun Jun 23, 2019 4:21 pm
by epilectrolytics
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.

Re: playing with caustics

Posted: Sun Jun 23, 2019 6:01 pm
by provisory
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.

Re: playing with caustics

Posted: Sun Jun 23, 2019 6:44 pm
by epilectrolytics
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

Psor Prism

Posted: Sat Jun 29, 2019 8:03 pm
by epilectrolytics
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

Re: playing with caustics

Posted: Sat Jun 29, 2019 8:16 pm
by provisory
Nice!

Re: playing with caustics

Posted: Sat Jun 29, 2019 10:28 pm
by B.Y.O.B.
Awesome :)

Re: playing with caustics

Posted: Sun Jun 30, 2019 6:57 am
by Racleborg
Looks really nice! :)

Re: playing with caustics

Posted: Sun Jun 30, 2019 12:30 pm
by epilectrolytics
:D

Thanks!

Re: playing with caustics

Posted: Sun Jun 30, 2019 12:46 pm
by CodeHD
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 ;)

Re: playing with caustics

Posted: Sun Jun 30, 2019 1:03 pm
by epilectrolytics
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