## Two Point Perspective

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Sometimes called angular perspective drawing; in this method only the vertical lines are drawn vertically. The horizontal, depth, and length receding lines are drawn to the vanishing points located on the horizon line. The front view is no longer true in shape but is now drawn in an isometric configuration. Again, the location of the horizon line and the vanishing points on the line will provide many different "looks" of the object.

In two-point perspective the sides of the object vanish to one of two vanishing points on the horizon. Vertical lines in the object have no perspective applied. Our distance from an object seen at an angle determines where the vanishing points lie on the horizon. Two-point perspective is a much more useful drawing system than the simpler one-point perspective and the more complex three-point perspective. Objects drawn in two-point perspective have a more natural look. Figure 5.27 illustrates a typical architectural application of two-point perspective for a department-store interior.

To set up a two-point perspective, connect the corner height line to the right and left vanishing points, and, with the lines of sight in the plan, mark off the depth of the object. The procedure for constructing a two-point perspective view is essentially the same as for one-point perspective except for the additional step of establishing two vanishing points. In two-point perspective you can make the object look big or small by altering the proximity of the vanishing points to the object (Figure 5.28).

Shade and shadow are often used in perspective drawings to give a better perception of the depth and form of a space or object. The drawing of shadows and reflections both follow the same immutable rules of perspective.

Figure 5.24 A simple one-point perspective. Although it is possible to sketch products in one-point perspective, the perspective is often too aggressive to the eye, making objects appear bigger than they actually are.

### One-Point Perspective

Figure 5.24 A simple one-point perspective. Although it is possible to sketch products in one-point perspective, the perspective is often too aggressive to the eye, making objects appear bigger than they actually are.

The illustration in Figure 5.29 demonstrates how to draw a box in two-point perspective:

1. Put two vanishing points at opposite ends of the horizontal line.

2. Draw the front vertical of the box. Drawing the line below the horizontal will create a view that we are looking down on. To look at the object from below, draw the front vertical above the horizontal.

3. Draw lines from the top of the vertical that disappear to both of the vanishing points. Repeat the process for the bottom of the line.

4. To complete both sides, draw in the back verticals.

5. To draw the top of the box, draw lines from the back verticals to the opposite vanishing points.

Figure 5.25A A. Illustration of an interior using normal-view one-point perspective.