i understand the pictures but not the notes. i understand what you are depicting in the blue. but in the the red on the right hanbd side (B section) at top i am lost. it says"note the dimensions", i'm not sure what i am looking for.... like i dont understand what the attemptwas. was it that you were trying to show how a person who does not understand perspective is attempting to draw the Blue diagram underneath? if so then i understand!! if not then i am lost lol. also i am lost at the arrows next to the "do it", but if those are eyeballs depicting point of view then i do understand. just trying to get.. i only started to think they were eyeballs during my typing of this. so if that is the case, i also understand! lol. i am only sending this just in case someone else comes along. it is a very good tut as are all your others.
my last comment was about the A section red diagram.. i just realized that they are in fact eyeballs and that i understand what the slope looks like. the grid on the ground as in viewing from above and that would make the ball be rolling down from a looking down pov.. hmm.. clearly im answering my own questions (which makes this an even greater tutorial)
I drew this for a friend of mine because I was mentoring him, so I didn't bother to explain everything on the pic. About that "note the dimensions" part, I addressed an issue where he didn't get the dimensions in place according to the perspective and viewing angle. If not done right, the shape of the object changes dramatically. And yeah, those ">" things are eyes .
You don't need to understand this, but seems that you get the point just fine.
True. Constructing a perspective with one-, two- or three-points works to some extent, but only on very narrow field of vision. Human field of vision, on the other hand, is much wider. Constructed perspectives also don't take the eye/head movement in account, so they are kinda limited.
I myself prefer trying to draw things the way I would see them.
There are probably many books, though I don't know/remember any. However, a good place to study perspective is your own room. Use your peripheral vision to look around yourself and see how things look anything but straight, although you know they are straight. For example, if the walls were truly straight in your vision, then the wall behind you would be larger in size than the wall in front of you. But because that's not of course true, the wall won't get larger, everything around your vision needs to distort and bend so that the wall behind you would match the size of the wall in front of you.
Next time you walk on floor with tiling, notice how spherical it looks if you look at your feet and use your peripheral vision. Also notice how it seems to constantly change as you walk forward.
I learned perspective because I'm working with CAD models and I have made 3D renderings. While I learned to see how the objects behave as I orbit the view around them, I also learned the limits of the mathematical perspectives. If you want to try easy 3D modelling, try Trimble Sketchup (used to be Google Sketchup). After a basic how-to tutorial, it's very straightforward and easy to make basic models and see them in perspective.