Light fog effect and alpha layer output

[xqiuad]

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?

[lee_griggs]

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."

[xqiuad]

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?