Hi all, I got some great help with my last question so I'm back!
This time I have composited 2 separate videos of a band, one with the band in red and the other in black (both with a transparent background). I also have a video of a red visual effect flying across the screen.
What I want to happen is for the red band to be the main shot, but as the visual effect floats across the screen it reveals the black band beneath. When the black band is revealed it covers the red band entirely.
I tried using a simple "screen" blending mode but that meant that the black band wouldn't cover the red band, it treated the black band as transparent. Anyone have any better ideas?
Not sure I totally understand what you're trying to do, but I would think you should use an your red footage as an alpha matte for the band and have an additional layer of the red footage underneath that.
Don't use blending modes for this.
Use channel mixer or a similar effect to make your red smoke layer pure white. (Unless you made it look red for this use and it was originally white, in which case, just use the unaffected version of the layer.)
Use that as a track matte for the footage you want to reveal. Apply Levels as necessary to make the people more opaque.
And put a copy of your red smoke layer below it all.
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