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Key out black – detonationfilms
Hey guys!
Need to composite footage of smoke & fire on daylight footage.
The footage with the FX are on a black background – and are not prekeyed.
Im not pleased with the results io am getting so far….
I have tried most of the keying effects I know of…..
Has anyone got experience with footage from detfilms?
Thanks for all inputs!
BEcker
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10 Replies
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Hi
peace of cake with Knoll Unmult from Red Giant
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Guys, it’s Sunday.
Sunday is a day of rest. So take it easy and just change your Blending mode to Add, no need to pull key.
Heads up for those not in the know. Detonation Films rocks Large. MMmmm-kayyyyyy
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Yep – “add” works well, and you might want to play with the other blending modes. “Screen” drops out the black, but with many of these it may look a too transparent. But definitely get with it on blending modes… another way is to duplicate the layer and use a track matte – all of these are useful when needed.
As stated earlier, unmult is a free plug, and is sometime pretty darn useful… it’s used in the “Creating Motion Graphics” series by the Meyers.
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luma key is your friend for white and black keying
and of course the painfully obvious blend modes ..
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channels-set matte
also if something is too transperant toss curves on it, go to the individual channels and select alpha, pull the curve to the top lieft
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You’ll want to stay away from Keying. The modes and chanelling stuff are good. For fine-tuning the edges, Alpha Levels does a good job, if the route you chose gave you an Alpha Channel.
HTH
Roland Kahlenberg
https://www.broadcastGEMs.com – Adobe After Effects project files
https://www.myspace.com/rorkrgbspace -
[A.Zander] “channels-set matte”
If you go this route you will also want to use a Channels > Remove Color Matting effect set to black.
Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA -
whats the difference? I’ve always used set matte, is there a world i don’t know of?
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[A.Zander] “whats the difference? I’ve always used set matte, is there a world i don’t know of?”
Set Matte will pull a matte from a channel of your choosing, generally with fire or such effects you would use the luminance of the footage. However, since the footage is premultiplied some of the pixels at the edges of the footage will have some luminance (they’re not entirely black) but will be mostly black, this results in that ugly dark fringing you can get around lighter objects.
Remove Color Matting should be used WITH Set Matte, it removes the black from these semi-transparent dark pixels, making them semi-transparent bright pixels =)
Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA -
“channels-set matte
also if something is too transperant toss curves on it, go to the individual channels and select alpha, pull the curve to the top lieft”
I have to say this is what worked best for me in my particular case. the luma matte, set matte, etc. all made the light pastel colors of my image transparent until i messed with the alpha curves. thank you
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