Perspective Type

One point

This perspective means that the vanishing point is right in the middle of the frame.

Two point

This perspective means there are two vanishing points at the same height(the horizon line) on the left and right side of the frame.

Three point

This perspective means there are three vanishing points, two at the same height(urually the horizon line) on the left and right side of the frame and one is at the top(looking up, the sky point) or the bottom(looking down, the ground point) of the frame.

Relationship between one-three point perspective