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Rendering with Arnold in CINEMA 4D using the C4DtoA plug-in.
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Light fog effect and alpha layer output

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Message 1 of 3
xqiuad
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Light fog effect and alpha layer output

I would like to build a light beam with transparent or white background.

However, I found that atmosphere volume can not be shown in the alpha layer. And when I changed the background to white, the light is too weak to see. How to deal with this situation?


uv-light.png


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Message 2 of 3
lee_griggs
in reply to: xqiuad

From the docs:

"atmosphere_volume should be composited using an 'additive' mode such as 'screen' because volumetric scattering is the light that cannot be represented in the alpha channel."

Lee Griggs
Arnold rendering specialist
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Message 3 of 3
xqiuad
in reply to: lee_griggs

Yeah, thanks for your reply. Actually, I found this doc before, and is there any solution to achieve this light fog effect that I showed in the image?

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