Vanishing point of multipoint perspective, and historian Kirsti Andersen compiled these observations. She notes, in terms of projective geometry, the vanishing point is the image of the point at infinity associated with , as the sightline from through the vanishing point is parallel to . As a vanishing point originates in a line, so a vanishing line originates in a plane that is not parallel to the picture . Given the eye point , and the plane parallel to and lying on , then the vanishing line of is . For example, when is the ground plane and is the horizon plane,
The Mysteries of the Horizon The Mysteries of the Horizon The Mysteries of the Horizon () is a 1955 Surrealist oil painting by René Magritte. The painting depicts three seemingly identical men in bowler hats. They are in an outdoor setting at twilight. Though they appear to be sharing the same space each one also seems to exist in a separate reality. Each is facing a different direction. In the sky above each figure is a separate waxing crescent moon. Men in bowler hats appear frequently in Magritte's work starting with his 1926 painting "The Musings of a Solitary Walker". They are represented as having