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How to make FX color independent of it's background?

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Felipe Prado
How to make FX color independent of it's background?
on Aug 31, 2018 at 7:44:34 pm
Last Edited By Felipe Prado on Aug 31, 2018 at 8:36:34 pm

Hey Guys!

So I did this effect below which I love very much:



That effect as you can see is in the black background, it is in ADD MODE.

Now the problem I am having is that if I put that mode in a background, that is lighter than black, the color will change completely, my question is how can I maintain this color making it independent of it's background? Because look how it looks in a brighter BG:



If I take the ADD out of the effects now I have another problem, look how dull the colors look:



Lastly, that FX is composed by 2 Fractals, one in the Front, with a mask to show the "Deck Content" and another Fractal in the Back, then 3 Layers of layers of Particles done in Particular.

Overall, I just want to maintain the same blue FX of the black background in a much brighter background, does that make sense?

Thanks in advance!


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Dave LaRonde
Re: How to make FX color independent of it's background?
on Sep 1, 2018 at 3:52:16 am

This would be a process known as rotoscoping. The glows will make it difficult. You would be better off going back to the original AE project. If you don't have it, it renains difficult.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Felipe Prado
Re: How to make FX color independent of it's background?
on Sep 1, 2018 at 4:18:25 am

Hey Dave! Thanks for taking time to answer my question!

Do you think maybe I can reach something similar through Levels/Curves? Or Rotoscoping is the only way here?

I just want to maintain it's color just like it was in the black background!


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Dave LaRonde
Re: How to make FX color independent of it's background?
on Sep 2, 2018 at 2:35:35 pm

The problem comes from the lack of an alpha channel. If you had one, it would be no problem. Apparently you do not. So you have to create transparency, and the glow makes it tough to do. I suggest cutting a mask around the -- um, scroll, I guess -- and using the glow effect to recreate the glow. It not be a perfect replication, but it might be close enough.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Felipe Prado
Re: How to make FX color independent of it's background?
on Sep 2, 2018 at 6:59:23 pm

Hey Dave!

Well actually it has a alpha channel, check it out!



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Kalleheikki Kannisto
Re: How to make FX color independent of it's background?
on Sep 3, 2018 at 6:03:56 pm

The first thing I'd do is to change the blend mode to Normal and add a curves adjustment on the layer(s) that need the color boost. If curves alone seems too tricky, increasing saturation first might get you closer.

Kalleheikki Kannisto
Senior Graphic Designer


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Walter Soyka
Re: How to make FX color independent of it's background?
on Sep 3, 2018 at 9:32:57 am

You can use an Unmult effect (there are free versions from Red Giant Software and Mekajiki) to remove the black background.

https://www.redgiant.com/user-guide/universe/unmult/ (GPU)
https://www.redgiant.com/support/legacy-installers/ (CPU)
https://www.mekajiki.com/free_tools.html

Walter Soyka
Designer & Mad Scientist at Keen Live [link]
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
@keenlive [twitter]   |   RenderBreak [blog]   |   Profile [LinkedIn]


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Felipe Prado
Re: How to make FX color independent of it's background?
on Sep 4, 2018 at 1:18:22 am

Thanks guys!


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