Perspective Drawing - The sixth illustration is actually missing a vanishing point, making it a five-point perspective drawing. The first five vanishing points are up, down, left, right, and forward. The sixth vanishing point is "backward," or behind, so a complete drawing includes the opposite view as well. These drawings are usually two circles next to each other.
One-Point Perspective. One vanishing point is typically used for roads, railroad tracks, or buildings viewed so that the front is directly facing the viewer. Any objects that are made up of lines either directly parallel with the viewer's line of sight or directly perpendicular (the railroad slats) can be represented with one-point perspective.