Perspective Drawing

[perspective]

I am new to this forum and would like to add my help with Perspective Drawings. I often see questions about perspective drawings with some strange answers. One of the problems is how do you measure in perspective. Please feel free to ask any question you wish and I am sure I can help.

[gwpriester]

How do I determine the area of accuracy in a 3 point perspective drawing?

[wizard509]

I don't know Gary, The 3rd vanishing point can be found but it's wierd how it's done, and I no longer remember how.

[gwpriester]

I'm posing the question to perspective. I learned how to do this at Art Center College of Design but it was a few years ago (63-67). I just wanted to see if anything has changed.

[wizard509]

All I know and remember is after I had found the view and set it up. I put push pins in the vanishing points and rubber banded a long straight guide to those and used it that way. Also I would push pin my painting down so it wouldn't move. I tried to be as accurate as I could be.

[wizard509]

All I know and remember is after I had found the view and set it up. I put push pins in the vanishing points and rubber banded a long straight guide to those and used it that way. Also I would push pin my painting down so it wouldn't move. I tried to be as accurate as possible.

[gwpriester]

Yes, Larry, thanks. But I am waiting to hear what Perspective has to say. Your two photographic examples are really more appropriate for two point perspective, and for that type of perspective there is also an area of accuracy in the middle before things start to distort.

[perspective]

I have produced a perspective drawing that I hope will show the area of accuracy by showing the importance of the Cone of Vision. I have used the angle for 3 point perspective (60 degrees) but for 2 point perspective you should use 30 degree for your area of accuracy because the subject is smaller. Notice how image A is distorted if you are too close to the subject.

When setting up your perspective view you can determine this angle.

[wizard509]

This reinforces what I posted months ago.



EDIT; Anything outside the 30deg cone will be distorted, possibly the closer to the boundaries of this cone will too, it's just not apparent.

[perspective]

It is correct to say everything outside the 30deg cone will be distorted but only if you are drawing an object that is small. The object would have to be anything from a cell phone to a suitcase. We must remember the 30deg Cone of Vision is only for small objects.