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+--- Thread: Arnold Multiple Scattering Illumination (/showthread.php?tid=1772)
Arnold Multiple Scattering Illumination - iamyogi - 10-26-2016
Hey everyone,
I'm looking for a way to illuminate my smoke with my fire using the Black Body shader for Arnold in Maya 2017 similar to how it's lit in the example video from Sitni Sati's vimeo page. Is there is some way to have Arnold treat the fire as a light so that it could illuminate the smoke as well as its surroundings? If not, is there is a way to get the Multiple Scattering illumination settings from the FumeFX tab to work in an Arnold render? Thanks for any help!
Re: Arnold Multiple Scattering Illumination - keithb - 10-26-2016
Have you set your volume ray depth to something like 2-3?
Re: Arnold Multiple Scattering Illumination - iamyogi - 10-26-2016
Yeah, I've done renders with it set from 0 to 16 with no difference in the result. I've also tried playing with the Volume Indirect sample settings with no changes either.
Re: Arnold Multiple Scattering Illumination - josip - 10-27-2016
Hi,
to be able to render FumeFX GI, following Arnold settings must be set:
- Arnold Renderer Settings > Arnold Renderer tab > Sampling > Camera (AA) must be at least 1
- Arnold Renderer Settings > Arnold Renderer tab > Sampling > Diffuse must be at least 1
- Arnold Renderer Settings > Arnold Renderer tab > Sampling > Volume Indirect must be at least 1
- Arnold Renderer Settings > Arnold Renderer tab > Ray Depth > Total must be at least 1
- Arnold Renderer Settings > Arnold Renderer tab > Ray Depth > Diffuse must be at least 1
- Arnold Renderer Settings > Arnold Renderer tab > Ray Depth > Volume must be at least 1
Then, you can control GI strength with following FumeFX params:
- FumeFX Attributes > Rendering Settings > Fire > GI multiplier (put at least value of 10.0 at first to see if it works, and adjust it later)
- FumeFX Attributes > Rendering Settings > Smoke > GI multiplier (put at least value of 1.0 at first, and adjust it later)
Older versions of Arnold didn't have the Volume Ray Depth option, but volume GI did work.
Just checked FumeFX black-body fire GI on FumeFX smoke in Arnold, and it works so there shouldn't be a problem.
If you experience any further problems, please post FumeFX, Arnold, and Maya versions.
Regards,
Josip Sumecki
Re: Arnold Multiple Scattering Illumination - iamyogi - 10-27-2016
That did the trick, thanks for the reply!
Re: Arnold Multiple Scattering Illumination - josip - 10-31-2016
I'm glad it works.
Regards,
Josip Sumecki