User Manual

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.
Matte Tab
The Matte tab refines the softness, density, and overall fit of the resulting matte.
Filter
This control selects the filtering algorithm used when applying blur to the matte.
 Box: This is the fastest method but at reduced quality. Box is best suited for minimal
amounts of blur.
 Bartlett: Otherwise known as a Pyramid filter, Bartlett makes a good compromise
between speed and quality.
 Multi-box: When selecting this filter, the Num Passes slider appears and lets you
control the quality. At 1 and 2 passes, results are identical to Box and Bartlett,
respectively. At 4 passes and above, results are usually as good as Gaussian, in less
time and with no edge “ringing.”
 Gaussian: The Gaussian filter uses a true Gaussian approximation and gives excellent
results, but it is a little slower than the other filters. In some cases, it can produce an
extremely slight edge “ringing” on floating-point pixels.
Blur
Matte Blur blurs the edge of the matte based on the Filter menu setting. A value of zero results
in a sharp, cutout-like hard edge. The higher the value, the more blur applied to the matte.
Clipping Mode
This option determines how edges are handled when performing domain of definition
rendering. This is profoundly important when blurring the matte, which may require samples
from portions of the image outside the current domain.
 Frame: The default option is Frame, which automatically sets the node’s domain of
definition to use the full frame of the image, effectively ignoring the current domain
of definition. If the upstream DoD is smaller than the frame, the remaining area in the
frame will be treated as black/transparent.
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