User Manual

Spill Tab
The Spill tab handles spill suppression in the Matte Control. Spill suppression is a form of color
correction that attempts to remove the screen color from the fringe of the matte.
Spill is the transmission of the screen color through the semitransparent areas of the Alpha
channel. In the case of blue- or green-screen keying, this usually causes the color of the
background to become apparent in the edges of the foreground subject.
Spill Color
This menu selects the color used as the base for all spill suppression techniques.
Spill Suppression
When this slider is set to 0, no spill suppression is applied to the image. Increasing the slider
increases the strength of the spill method.
Spill Method
This selects the strength of the algorithm used to apply spill suppression to the image.
 None: None is selected when no spill suppression is required.
 Rare: This removes very little of the spill color and is the lightest of all methods.
 Medium: This works best for green screens.
 Well Done: This works best for blue screens.
 Burnt: This works best for blue screen. Use this mode only for very troublesome shots.
Fringe Gamma
This control can be used to adjust the brightness of the fringe or halo that surrounds the
keyed image.
Fringe Size
This expands and contracts the size of the fringe or halo surrounding the keyed image.
Fringe Shape
Fringe Shape presses the fringe toward the external edge of the image or pulls it toward the
inner edge of the fringe. Its effect is most noticeable while the Fringe Size value is large.
Cyan/Red, Magenta/Green, and Yellow/Blue
Use these three controls to color correct the fringe of the image.
This is useful for correcting semitransparent pixels that still contain color from the original
background to match the new background.
Chapter – 98 Matte Nodes 2170