Volumetric Lights

Forums: Volumetric Lights
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Volumetric Lights

Postby lightvu » Fri Nov 30, 2018 8:49 pm

lightvu Fri Nov 30, 2018 8:49 pm
Hi guys sorry for flooding the forums this week.
New to Modo and relatively new to Octane.

I can't seem to find a good article or tutorial on creating volumetric lights. I saw a thread from a year or so ago that had an attached scene file for Modo that created a volumetric effect with a light.

If someone can point me in the right direction that would be great.

:)
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Re: Volumetric Lights

Postby Greg » Sat Dec 01, 2018 3:13 am

Greg Sat Dec 01, 2018 3:13 am
Take a look at this one.

https://www.youtube.com/watch?v=fukXVtm18Kk


Add an area light to the scene and in the properties convert it to an octane emitter. Basically you need to create your 'medium' (fog bank...whatever) with geometry and convert it to a volume...then your lights will show up. I'll do a better tutorial maybe this weekend.
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Re: Volumetric Lights

Postby lightvu » Mon Dec 03, 2018 4:56 pm

lightvu Mon Dec 03, 2018 4:56 pm
Hey Greg. That would be great if you could demonstrate how the technique in this video can relate to creating a volumetric light. Say like a spotlight on stage with a slight fog.

Cheers! :mrgreen:
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Re: Volumetric Lights

Postby Greg » Thu Dec 06, 2018 6:54 am

Greg Thu Dec 06, 2018 6:54 am
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Re: Volumetric Lights

Postby face_off » Thu Dec 06, 2018 10:35 pm

face_off Thu Dec 06, 2018 10:35 pm
Great video Greg - thanks for posting. If think you can also get rid of the Plane emitter geometry showing behind the frog's head by setting the Opacity to 0 (although I haven't tried that inside a Volume).

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Re: Volumetric Lights

Postby Hesekiel2517 » Sun Dec 09, 2018 4:03 pm

Hesekiel2517 Sun Dec 09, 2018 4:03 pm
Thanks for the Video! You can get more control of the Cone Angle by using this assembly in the Distribution Slot:
https://render.otoy.com/forum/viewtopic.php?f=34&t=62905&p=321848&hilit=directional#p321817
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Re: Volumetric Lights

Postby Greg » Tue Dec 11, 2018 12:09 am

Greg Tue Dec 11, 2018 12:09 am
Thanks Hesekiel, I'll take a look. I need to do an update to this video with the environmental medium.

best,

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Re: Volumetric Lights

Postby Hesekiel2517 » Sat Dec 15, 2018 11:55 am

Hesekiel2517 Sat Dec 15, 2018 11:55 am
Cool!

Is there a way to add noise to the volumes density? Like in Modo where you can add a lot of extra detail with a texture
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