Blackmagic Forum

Hey There,

I have been recently compositing smoke from FumeFX with fusion studio, and have been running into some issues with being able to color correct and control the alpha properly.

I am wondering what is the correct render element to use from FumeFX and what is the proper way to integrate the smoke into a comp using blending modes or what?

I am also having trouble controlling the alpha for color correction, and also need to know what is the proper way to give the smoke an alpha, and not crush its values.

Thank you for your time.

-Gianni Vardanega

You shouldn't need to do anything to it at all. Is it colored smoke or just grey/white?

The smoke is just grey and does need to be color corrected, Which is not a problem on my end.

Is it better to merge the smoke in and turn off alpha gain on the merge node, or to use a blending method in the merge node such as screen... etc.

That is where my confusion is.

Thanks for your time.

As long as it doesn't have colored absorption (AR, AG, AB) then you should just use additive over.

That's the only mathematically correct way to do it. But you can do whatever you want to make it look good, but if over doesn't work, then there's an issue with the render, not the comp.