Inverse perspective — where it appears
The picture whose lines spread
In a Byzantine icon the sides of a table diverge with depth. The standard account says the vanishing point is behind the viewer. It is not — it sits below the near edge, in front of the eye, and it is the vanishing point of a direction running down and away.
An inverse perspective is a leaning plane
Ask a divergent construction what solid it depicts and it answers: a rectangle, four right angles, near edge equal to far. What the splay encodes is not the shape but the plane's tilt — and a real square on a plane leaning toward the camera really does photograph with its far edge wider.
Named alongside it
The objects these essays reach for when they reach for this one.
DemonstrationDepicted rectangleone-point perspectivePicture planeVanishing pointBack projectionCamera tiltDrawing systemParallel projectionpoint at infinityProjective mapreconstruction ambiguity