What comes closest to part 2: https://www.youtube.com/watch?v=Mtsv1IpjUgs&t

What is a Vanishing Point? How does Perspective work?
These questions will be answered complete and utterly and with great detail.

If you just came here for the QUICK USE OF VANISHING POINTS:
Go to 24:38. You can ignore the talk about infinite spheres. The View Plane is basically an infinite paper on that you draw, and that contains the Vanishing Points, that mostly are outside of your image/canvas. That should do for you to understand everything.

If you just came here for the REALLY QUICK USE OF VANISHING POINTS:
-The triangle of Vanishing Points has no angles greater than 90°.
-The middle of the image is the orthocenter of the Vanishing Point triangle.
-If you draw too far, it looks distorted.

0:00 Introduction
2:00 Motivation & Paradox
5:26 Vanishing Points
9:16 Projections
10:16 Parallel Perspective
11:48 Linear Perspective
15:00 View Plane
16:22 Fisheye
20:00 Paradox Solution
21:26 Application of Linear Perspective and Vanishing Points
21:35 How many Vanishing Points are there
24:10 1-, 2-, 3-point-perspective at one glance
24:38 How/Where to place the Vanishing Points on the View Plane
25:28 Place Vanishing Points, look where the Canvas is
28:01 Why 60°?
31:38 Place Canvas, look where the Vanishing Points can be
33:00 All rules + causes at one glance
34:13 90° cases and how to deal with far away Vanishing Points
36:44 Horizon
39:02 Facts, Tricks, Implications
39:26 End

Over 200 hours, I don't know if I ever again make a video... :0

Nsio: https://www.deviantart.com/nsio/art/Nsio-Explains-Distortion-in-Perspective-568509612
Stephen Leonardi: https://unsplash.com/photos/ileSGpTvhjw
Derivation for the formula for the radius: https://www.deviantart.com/ucandothat2/art/Derivation-925806457

Thank you!


My DeviantArt Page: https://www.deviantart.com/ucandothat2