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There are a couple mocha techniques to deal with tracking totally obscured areas: 1. As Eric suggested, track up until the frame where it goes off, stop, move your shape to any area where the motion is similar to the motion of the plane you are tracking. Track those frames until your original object comes back to frame, stop and move search area back. The point here is that animating the search area does not throw off the surface. 2. Another method is to track until it goes off, them stop and skip the area where the track is obscured. Skip ahead to area where object reappears and pick up the track again. Next, enable manual surface which displaces ALL surface keyframes. Edit these to delete some unnecessary in betweens. You could alternately use AE for the keyframe adjustment. Hope this helps. If you want to post the shot, we are happy to take a look. Best, Ross Sent from my iPhone
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