1. © 2002, The McGraw-Hill Companies Perspective Theory by Brian Curtis © 2002, The McGraw-Hill Companies

2. A PowerPoint lecture series to accompany DRAWING FROM OBSERVATION

3. © 2002, The McGraw-Hill Companies VISUAL FIELD (Linear Perspective) VISUAL WORLD (Direct Perceptual Experience)  Based on the use of only one eye so we see depth through monocular cues.  Our eye must look straight out at the horizon, parallel to the ground plane.  We can only see things that are within a 45° cone of vision around our line of sight.  We normally use two eyes and experience spatial depth binocularly (stereoscopic vision).  We are by nature fidgety creatures and we commonly look up, down, and all around.  We can actually see out of the corners of our eye (peripheral vision - up to a 200° angle).

4. © 2002, The McGraw-Hill Companies VISUAL FIELD (Linear Perspective) VISUAL WORLD (Direct Perceptual Experience)  We must stand absolutely still so that our viewing position remains in the same exact spot.  We must stare (fixate) straight ahead at a single point throughout the course of the drawing.  We generally use side to side movement (parallax) to help determine distance between objects.  The eye is the most restless and fickle organ in our entire body and by nature is constantly moving.

5. © 2002, The McGraw-Hill Companies VISUAL FIELD (Linear Perspective) VISUAL WORLD (Direct Perceptual Experience)  The world by its very nature is in a constant state of flux. We sense the world around us because we are attuned to things changing. We become numb when we are subjected to a constant stimulus.  We are actually IN our environment. It is a multi- sensory experience in which sight is only a part. We are not just looking, the world breathes and moves.  The entire system is predicated on there not being any change at all. Everything is static, including time. The instant becomes frozen.  The basic element of linear perspective is the imaginary picture plane that floats before our eye at 90° to our line of sight. It is the “window” upon which we see all the things in our visual field.

6. © 2002, The McGraw-Hill Companies Theory of Ideal Forms

7. © 2002, The McGraw-Hill Companies Plato’s Republic

8. © 2002, The McGraw-Hill Companies Ever Changing Reality Heraclitus (540-475 BC) Henri Bergson (1859-1941)

9. © 2002, The McGraw-Hill Companies Thou shalt not …...

10. © 2002, The McGraw-Hill Companies Those who hold images sacred A long and rich tradition

11. © 2002, The McGraw-Hill Companies Monocular Cues

12. © 2002, The McGraw-Hill Companies

14. Alternative Systems of Perspective

15. © 2002, The McGraw-Hill Companies

17. Brunelleschi Leon Battista Alberti Renaissance Perspective

18. © 2002, The McGraw-Hill Companies This concludes the lecture Perspective Theory