Three-point perspective is used to indicate unusual vantage points and create exaggerated spatial effects. Three-point, sometimes called "bird's eye" or "worm's eye" view, starts out like a two-point drawing: two widely spaced vanishing points are placed on a horizon line; however, a new vertical line is added. At one end of this line is placed the vertical vanishing point. As before, the receding horizontals follow the orthogonals back to the left and right points, but the verticals no longer remain parallel. Instead, they too diminish as they approach the vertical vanishing point.
