Description and Instructions:
Automatically creates a DOD border around an image sequence by tracking significant pixels.
Track Alpha/Luminance/Channels etc.: Determines whether specific channels are scanned during the track
AssessThreshold: The value at which a pixel is considered "worth" being included in the DOD
proxyLevel: A proxy is made of the original image (it's bloody slow otherwise). The default is a quarter, which means you have the possibility of a DOD 3 pixels larger than your actual image. You can always set this to 1 and use one of the Pixar proxy sets instead.
graceSize: For some completely inexplicable reason, pixels were getting shaved off, so the graceSize forces the DOD to be slightly larger than the tracked results. This potentially adds a few extra pixels, but is calculated based on the proxy resolution and in most cases won't cause any pain.
internals: stuff I needed to expose for the tracker to show up under the viewer. You don't need to edit anything here.
Operation: track with the track forward button under the viewer, then switch the applyTransform to DOD mode to use the resulting tracked DOD.