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Apparition Mist in AE
Ok, so i used Fractal Noise to create a sort of mist for an apparition that t i’m crcreating in After Effects. My question is, how do i make the black part of the effect transparent so that when i bring in a video clip of the person to key out to become tehe apparition, i can overlay the effect and use multiply to make the mist a part of the person.
To key out the person i’m shooting him against a solid background and keying out the color. Once i do that i plan to lower the opacity of the clip to make him appear ghostlike.
I chose fractal noise because with some playing around i managed to create this cool looking mist twirly effect, i just have to get rid of that black background in order for you to see the person.
Any advice would be great, thanks!
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7 Replies
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There are many ways to make the black part of the fractal noise transparent, but I would say the easiest woul be to pre-comp it, and apply the “screen” transfer mode to the precomp.
~Colin -
I don’t believe you actually need to precomp it for that. You can just set the layers transfer mode to screen.
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Aharon Rabinowitz
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http://www.allbetsareoff.com
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Your right Aharon….since Blending modes are the last thing applied when you render (masks, effects, transforms, blend modes) no precomp necessary.
~Colin -
Either use blend modes or get an unmultiplying plugin such as XMult, Knoll Unmult or Walker Effects Alpha tools. A cheap way would be to use a duplicate of the layer as a luma matte.
Mylenium
[Pour Myl
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Yes, they are all right.
And if after you apply the Screen mode there is still some black edge, you can apply Remove Color to eliminate it. -
Use a copy of your keyed person (a precomp) as a matte for the Mist layer to constrain the mist to the Ghost’s body.
TonyTony
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The screen blending mode worked great, as well as the color key to get rid of the excess black. I even discovered on another post where you teach how to make an “invisible man” that if you use displacement mapping i could adjust the mist over the “ghost” even more.
I really appreciate the advice guys!
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