Three-point perspective is usually used for buildings seen from above (or below). In addition to the two vanishing points from before, one for each wall, there is now one for how those walls recede into the ground. This third vanishing point will be below the ground. Looking up at a tall building is another common example of the third vanishing point. This time the third vanishing point is high in space . Three-point perspective exists when the perspective is a view of a Cartesian scene where the picture plane is not parallel to any of the scene's three axes. Each of the three vanishing points corresponds with one of the three axes of the scene. One-point, two-point, and three-point perspectives appear to embody different forms of calculated perspective. The methods required to generate these perspectives by hand are different. Mathematically, however, all three are identical: The difference is simply in the relative orientation of the rectilinear scene to the

Comments

1. This seems incorrect to me, above horizon vertical lines should converge again. Those lines should not be straight they should be curved. Straight lines are a rough approximation which totally fails in this case.
2. This is really cool!
   But I still don't understand shit.
3. Not only does this not explain anything...his end product of what he has made is ugly.
4. this taught me that i have no idea what i'm doing.
5. WTF is he doing?
6. How does he move hat fast?!
7. What is ruler brand name?
8. it's not so much a fast sketch as a sketch that's been fast fowarded.
   
   very cool. i admire people who can draw freehand.
9. too fast, formulas unreadable, noc comment.sorry, but its completely useless to me. impressing tripod, anyway.
10. Motivating to rip out some perspective of light and shape using this mathematical approach. Life changing thanks.. Hay people its not what he drew it is pulling out the unknown edges, tops, bottoms, and so fourth... More sir!!   
11. you can actually slow down a bit..
12. qual a marca das canetas ?
13. my brain hurts
14. I have no idea architect-thing can be as cool as a guitar hero tutorial until I press the play button of this video
15. whats songs name?
16. nice
17. math in art made me poo.
18. Really! The point go out!!!! kkkk
19. this is not a tutorial.. 
20. No es demasiado complicado, es que se complica demasiado.