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You can that where the mask is light you see the blue background and the dark
letter A. Where it is dark, you see the red background and the light letter B. Look
along the bottom of the mask – there is a gradation that goes gradually from white
to black in the middle portion. In the resulting image, you can see how that part of
the image “fades” from the foreground to the background.
Input Properties
• foreground: a video stream that will become more visible as the corresponding
area in the mask approaches white.
• background: a video stream that will become more visible as the corresponding
area in the mask approaches black.
• mask: a video stream that determines whether you see the foreground or
background image. Where the mask is white, you will see only the foreground
image. Where it is black, you will see only the background. When the mask is a
color or shade of gray, you will see a mixture of the foreground and background,
showing more of the background as the mask approaches black.
• strength: when this value is set to 100%, the mask functions normally. When set
to a lower value, you will see more of the foreground. (The internal effect is that
the mask is lightened as the strength decreases.) By ramping this value from 0 to
100 you can fade in the mask, by ramping from 100 to 0 you can fade it out.
• bypass: When turned off, this effect functions normally. When turned on, the
effect is disabled and the video input is passed directly to the video output.
Output Properties
• video out: the masked video stream.
Isadora Manual
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