User Manual

Solid Replace Mode
This determines how the solid mask restores color to the image.
 None: No color replacement. The solid mask does not affect the color.
 Source: The color from the original image.
 Hard Color: A solid color.
 Soft Color: A solid color weighted by how much background color was
originally removed.
Solid Replace Color
The color used with the Hard Color and Soft Color replace modes.
 Invert: Inverts the solid mask, before it is combined with the source Alpha.
Garbage Mask
 Invert: Normally, solid areas of a garbage mask remove the image. When inverted, the
transparent areas of the mask remove the image.
Common Controls
Settings Tab
The Settings tab in the Inspector is also duplicated in other matte nodes. These common
controls are described in detail at the end of this chapter in “The Common Controls” section.
Difference Keyer [DfK]
The DifferenceKeyer node
Difference Keyer Node Introduction
Difference keying is a process that produces a matte based on the differences between two
images. A difference key uses two input images: one containing the subject with the
background and another containing the background without the subject.
Although the process sounds reasonable at first glance, subtle variations in the camera position
from shot to shot usually make it difficult to get clean results.Think of the futile attempt of trying
to key smoke in front of a brick wall and using a clean plate of the brick wall as your difference
input. Part of the wall’s structure is always visible in this keying method. Instead, a Difference
Keyer is often used to produce a rough matte that is combined with other nodes to produce a
more detailed matte.
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