Adobe 25510629 User Guide - Page 72
Advanced compositing tasks, then use the same input clip in each session
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If the overlay covers part of the subject that should be in front and repositioning is not an option, then you may need to split the scene in two, and delete or adapt the overlay in the second part. For example, assume that there's a doorway behind the subject and the area from the door frame to the left is part of the overlay to create the illusion that the subject is entering the scene through that door. It's likely that the subject's right hand would be behind the overlay when gesturing. For instructions on getting around this type of situation, see "Advanced compositing tasks" on page 72. Advanced compositing tasks You may want or need to have an element in the foreground in one segment of a scene but in the background in another segment. Moving all or part of an image from the foreground to the background, or vice versa, can help you to get the subject on the correct side of a wall, doorway, or pillar. This can also help create the illusion of dimension within the scene. All of the overlays in a particular session are always in front of the subject. However, you can achieve this illusion of dimension by breaking the scene into two or more sessions. You can then use the same input clip in each session, trimming it appropriately by setting the In point and Out point so that the segments blend seamlessly. You should break the sessions at a timepoint where the subject is not in front of or behind the element that is swapping layers. For more information, see "Trimming the In and Out Points in a video clip" on page 104. The images below represent a three-part scene. Trim times Overlay In Point: 0:00.00 Out Point: 0:10.00 Composited shot 72 How to