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Using Add Many Trackers
This method is a little ad hoc, but straightforward.
Run Stabilize from Camera Path to back to the full 360 VR view and accurately stabilize the imagery to the world coordinate system. The camera still follows its 3D path, but its orientation is now locked to the Front view, corresponding to the stabilized imagery. The trackers are updated to match the 360 VR footage.
On the Features panel , Clear all blips and Blips all frames. In the camera view, lasso an area of the image where you'd like more trackers, then use the main menu's Track/ Add Many Trackers and select the option for Only within the last lasso. Keep "Regular, not ZWT" off. You can lasso and add additional trackers multiple times throughout the shot. Since the new trackers are ZWTs, they will immediately have a 3D location.
Use the Sort by error option and the hierarchy or graph editors to identify and delete any problematic ZWTs.
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