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Tracing Rays

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Tracing Rays

Unread postby xilofoton » Mon Jun 19, 2017 6:08 pm

Hi,

I`m working on tutorials and Q&A packs related to lighting and look-dev (and beyond...).
I`d like to introduce them here:

https://xilofoton.wordpress.com/tracingrays/

If you are interested, you can give me some feedback either there through the form or here to finalize the content, or put your question into the list.

Thank you.
Cheers.
VFX Artist, Clarisse Specialist
https://scivfx.wordpress.com/
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Posts: 198
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Re: Tracing Rays

Unread postby paq » Tue Jul 04, 2017 4:00 am

Hi Xilo,

I would be very interested by the cloud chapter.
I still find quite difficult to build 360 cloudscape using 'just' .vdb, compared to something like Terragen.
But I`m very curios to read your research on the subject.
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Re: Tracing Rays

Unread postby xilofoton » Tue Jul 04, 2017 11:11 am

Hi Paq,

thanks for your interest! I did some setups to directrly create cloudscapes in Clarisse with the new paint tools.
The basic idea is to layout spheres and paint the details on them in 3D. Or without them, because if you don't select objects to paint on, you can additively paint on top of the previous strokes, so you have a big whipped cream spray. This makes some fun and adding the small details with procedural shading seems a working solution but it needs further investigation to get really good results. Especially for the lighting, because it is pointless to use brute-force globillum, rather I did experiments with the mixture of the base spheres with sss and emission with gradients in the volume. But 1 bounce at least is necessary in the volume. I'll post images later...

The second thing to shape them is to brute-force sim the clouds in Houdini with all the necessary physics as it happens in the reality, but for production it is not likely to be a good way. For learning the nature of clouds, I found it interesting.
VFX Artist, Clarisse Specialist
https://scivfx.wordpress.com/
xilofoton
 
Posts: 198
Joined: Tue Jul 21, 2015 2:29 pm


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