I’m doing a track on a scene with perspective grid. I want to hold back a section of the image and am using a gmask. All good. I’ve already got an external roto, not a spline mask of the section I’d like to hold back. As far as I know you can only use a G Mask to hold out a section from tracking.
Am I missing something?
No. Not missing anything. At this stage you can only use a gmask to exclude or include the tracking area of a perspective grid