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removing a black background

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David Holmes
removing a black background
on Oct 13, 2017 at 2:37:23 am

When i import a explosion into after effects and use DEMULT from ignite express to remove the black background it removes the black smoke as well. Anyone out there that might have any ideas what i am doing wrong. Have tried doing it with Screen and Add it does the same.


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Dave LaRonde
Re: removing a black background
on Oct 13, 2017 at 3:32:35 am
Last Edited By Dave LaRonde on Oct 13, 2017 at 3:32:58 am

It sounds like the footage is bad. Working with Black smoke on a black background is an exercise in frustration. This stuff should have an Alpha Channel on it.

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


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David Holmes
Re: removing a black background
on Oct 13, 2017 at 11:09:39 am

HI, The explosion has a transparent background but i don't seem to be able to remove the black. I have done it other times with other effects , but not this one. David


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Dave LaRonde
Re: removing a black background
on Oct 13, 2017 at 4:16:58 pm

Highlight the clip in the project pane and look at the information at the top. If it doesn't say "millions (or trillions) of colors +" it doesn't have an alpha channel.

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


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David Holmes
Re: removing a black background
on Oct 14, 2017 at 9:42:38 am

Hi Dave, checked out the footage and there is no mention about " Millions so that means it has on Alpha channel". I will have to find another explosion. Thank you for you help. David.


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Roei Tzoref
Re: removing a black background
on Oct 13, 2017 at 1:15:33 pm

can we see the footage or a frame of it in the best quality?

Roei Tzoref
2D/VFX Generalist & Instructor
♫ AeBlues Tutorials ♫
http://www.tzoref.com


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David Holmes
Re: removing a black background
on Oct 15, 2017 at 8:05:39 am

thank you for answering my help plee. Dave the other man as put me right, it didn't have a Alpha channel with the footage but thank you anyway. David


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