Linear Perspective
By using linear perspective you can create amazing quite close to reality. The mathematical basis of this technique was created during the Reinassance by artist like F. Brunelleschi, Alberti and Piero de la Francesca, Albrecht Dürer and Leonardo da Vinci.
The Adoration of the Magi by Leonardo (1475)
The School of Athens’ by Raphael (1518).
A contemporary drawing with a extreme perspective by Luke Mancini
BASIC ELEMENTS:
Point of view: the observer's eye.
Horizon line: it is an horizontal line which height coincides with the height of the point of view.
Vanishing point: is is always on the horizon line and it is the point where parallel lines meet.
In this drawing the point of view is low.
And finally a graphic by BlueRoseArkelle.