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Rendering emissive transparent shaders


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Hello everyone!

I have scene with emissive volume and no density rendered in Karma which is being comped over footage. Issue: since its emissive transparent pixels I was unable to replicate the exact look in AE. Currently ignoring the transparency and using screen blend mode. I have read about straight and premul alpha, but couldnt implement these findings.

I know its impossible to have volumes emit light, while not blocking any light, but it would save a ton of time to render without density.

Anyone stumbled upon this and found elegant simple solution?

Essentially I want to have at least some sort of see through edges and full opaque volume inside dense areas.

Thank you very much for any help, I might want something impossible, but that's where creativity comes :D
 

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