User Manual

Matte Tab
The Matte tab refines the Alpha of the key, combined with any solid and garbage masks
connected to the node. When using the Matte tab, set the viewer to display the Alpha channel
of the Delta Keyer’s final output.
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.
Chapter – 98 Matte Nodes 2189