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USING VIDEO FX, COMPOSITING, AND MASKS CHP. 14
The sample below uses a generated text event that is partially transparent. For more information, see Using
generated media on page 247.
The following table shows how these two sample tracks are blended using each of the compositing modes.
Compositing mode Sample Description
Add Adds the overlay color values to the background. Available only in the
full version of Vegas software.
Subtract Subtracts the overlay color values from the background. Available only in
the full version of Vegas software.
Multiply (Mask) Multiplies the overlay color values by the background color values. This
makes overlay colors stronger and more present and results in a darker
video image. The opposite of this mode is Screen.
Source Alpha Uses the alpha channel to determine transparency in the overlay.
This compositing mode is based on the alpha channel characteristics of an
event or media file. If no alpha channel is present in the overlay, the Source
Alpha compositing mode has no effect.
Cut Cuts out the overlay color values from the background. Available only in
the full version of Vegas software.
Screen Multiplies the inverse of the overlay color values with the background color
values. This makes overlay colors weaker and less present and results in a
lighter video image. The opposite of this mode is Multiply. Available only
in the full version of Vegas software.
Set compositing
mode for
overlay track
Overlay track
Background track