Renaissance Handbook Linear perspective.
Perspective is a technique for representing three-dimensional space on a flat surface.
Many artists around the world have employed various techniques for portraying depth. However, it wasn't until the Renaissance that artists invented a mathematical system to show depth logically and consistently. The system of linear perspective gave artists a powerful new tool for creating realistic art. To create this illusion of space, the artist establishes a vanishing point on the horizon line. In one-point perspective, the forms are seen face on and are drawn to a single vanishing point.