https://www.nfsa.gov.au/sites/default/files/2023-11/Chapter%201%20Block%201000%20x%20745.jpg
Matte
High-contrast silhouette used in optical effects printing (1985). An opaque outline that limits the exposed area of a picture, either as a cut-out object in front of the camera or as a silhouette on another strip of film.
References
Case, D., 1985, Motion Picture Film Processing, Media Manuals, Focal Press, London, Boston