Garbage Matte - Blackmagic Design Ultimatte 12 Manual De Operaciones

Matte
This is the primary matte you will be working within your composite. This matte is derived using
the source connected to the foreground input. Typically a presenter in front of a green screen.
The matte is generated internally by analyzing the backing color in the source video and will
determine what is visible in the foreground image.
TIP Objects that obscure the backing color, either partly or completely, will be visible in
the composited image. In the matte, fully opaque black means the corresponding areas
in the fill image will be completely visible. Shades of gray means partially transparent.

Garbage Matte

A garbage matte excludes areas of a source you don't want to include in your composite.
For example, there may be lights and gripping equipment visible around the edges of your
foreground image. If you want to mask out these unwanted areas, a garbage matte lets you
do that. Garbage mattes can be generated externally so they precisely match shapes in your
source video, and connected to the garbage matte input.
What is a Matte? 8