… for Apple Motion
Tip #1767: Multiply Makes Luma Keys Easy
Multiply superimposes dark areas while removing lighter areas – automatically.
Multiply is a blend mode that drops out a white background while superimposing the darker portions of the image on a background.
It’s like a very fast luma key without having to make any adjustments. Here’s how it works.
In the Layers pane, stack the element with a white background on top of the background image.
Select the foreground image and go to Inspector > Properties and set Blend Mode to Multiply.
There’s nothing to adjust. Light areas are removed and darker areas are superimposed – instantly. The screen shot illustrates the process.
NOTE: The black edges in the top screen shot are from the Motion background, they are not part of the signature image itself. (The signature is Benjamin Franklin.)