- A selection (the shot's mask and each Colored Mark person) has key frames, each with its
own points: SAM 3 selects the subject on a key frame and tracks it up to the next one
(before the first, backward), so points added on a later frame correct the mask from there
on. Plans with one key frame (points + key) work as before; keys are saved next to them.
- The points window: after Segment the mask is shown over every frame of the shot, with a
play button, frame stepping (arrows), key-frame marks on the slider and a key-frame list
(jump / remove). Edited points mark the preview as old until Segment again.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>