More on Two-Point Perspective

When using two-point linear perspective, one must look carefully at the placement of the object. If the object is not perpendicular and parallel to you and you are looking at it's corner, then you probably want to work in two-point. Sometimes when working in two-point perspective one of the vanishing points is not on the page. You then must approximate where the point falls by looking at the angles of the object that you are drawing. The best way to approximate an angle and find a vanishing point in two-point perspective is to first find your horizon line. This is a level line. By using this level and placing it next to the front corner of the object one can then see the angle and continue this angle out until it intersects with the horizon line. After you have found this intersection, then you have established your vanishing point for all the planes that are parallel and recede the same direction. Repeat this process for the other side
of your object and all convergence lines will be established.

Hint: Find your horizon line first. Then find out how much distance in proportion to the object's height there is between the horizon line and the front vertical edge of the object. This will help eliminate distortions.