Three-Point Perspective- The view point of birds and worms

Three point, or oblique perspective, is helpful when drawing a very tall building from ground level; or, when looking down from a very high vantage point. Three-point perspective often reveals 3 sides of an object with the help of 3 vanishing points. Two of the vanishing points are located on the horizon line and the third point is located either above the horizon line for a worm's eye view or below the horizon for a bird's eye view. The horizon line is always placed at the the viewer's eye level. Place the horizon line near the top of the paper to present your bird's eye view or the bottom of the paper to get the worm's eye level. Keep in mind, there are no horizontal or vertical lines in 3-point perspective as every line recedes to a vanishing point.

Practice 3-Point Perspective:
1. Draw the horizon line at your eye level and vertical line closest to you.
2. Draw the angle from the top of that line to the vanishing point to the left on the horizon line. Next, draw from the bottom of that line to the same vanishing point.
3. Determine the slant from the right of the vertical line and draw a line from the top of the vertical to the horizon to determine the right vanishing point on. Now, draw the lower line on the right.
4. To determine the vertical vanishing point, decide the width of each side of the cube and the angle of those lines. At the intersection you will find the third vanishing point. It will be perpendicular to the horizon.