Picture plane - Wikipedia
https://en.wikipedia.org/wiki/Picture_plane
OverviewFeaturesPositionCut of an ejectIntegrity of the picture planeSee alsoIn painting, photography, graphical perspective and descriptive geometry, a picture plane is an image plane located between the "eye point" (or oculus) and the object being viewed and is usually coextensive to the material surface of the work. It is ordinarily a vertical plane perpendicular to the sightline to the object of interest.
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