You
can render garbage masks in Interlaced mode to accommodate video
material.
To
render garbage masks in Interlaced mode:
Do
one of the following:
From the Modular Keyer or the GMask
node's menu, select Interlaced from the Rendering box.
From
the Keyer's Setup menu, select Interlaced from the Rendering box.
This setting affects both the Keyer and any garbage masks you create.
For more information, see
Field and Frame Rendering.