2017

Table Of Contents
(a) Outer Softness border (b) Inner Softness border (c) Softness vertices (d) Mask border
Some potential uses for the advanced gradient are:
Creating compositing effects when using Action
Removing wires
Pulling a key on areas of the mask where pickers are not needed
When using the Tracer in the GMask node in ConnectFX or the Modular Keyer, you can work in two modes:
advanced gradient and pickers. Individual vertices can be set to either of these modes.
You can change the default mode of the Tracer from advanced gradient to pickers, a system of localized
keys. Tracer analyses the colour information both inside and outside the mask, then compares the values
and uses a keying algorithm to derive a key for the mask edge. This system allows you to key images with a
lot of detail at the edges.
NOTE For good results with the Tracer, the object must have sufficient (and relatively consistent) chroma and
luma differences between its foreground and background.
To control softness and advanced gradients, use the Garbage Mask Shape controls.
(a) Edge Softness box (b) Alpha field (c) Offset field (d) Distance field (e) Inner Edge field (f) Outer Edge field
Applying Softness Using a Uniform Gradient
Use the Softness fields to apply a constant range of softness to the edge of the mask. The Alpha and Offset
fields define the fade-out of the softness gradient from the edge of the mask.
766 | Chapter 18 Masking and Rotoscoping