1 point, 2 point, 3 point

Examples of some artists using 1, 2, and 3 point perspective.

1 point perspective:

http://www.draw23.com/perspective

2 point perspective:

My favorite:

Tetsuya Ishida; http://curkovicartunits.pbworks.com/My-Surrealist-Room

Paul Heatson;

http://harvestart.blogspot.com/2010/04/two-point-perspective.html

3 point perspective:

My second favorite:

Paul Heatson;

M.C. Escher;