I know the steps for how to draw a surface in perspective using two vanishing points. I mean, I know how to draw a box, a pyramid, and a cone.
Now I got into a situation where I need to draw the following:
Can anyone give me an explanation? Or a reference to a book?
I know Ernest Norling's "Perspective Made Easy", but I don't think that he talks about oblique, or inclined, surfaces there.
Note: Let's keep the discussion about how to draw it with just a pencil and a straightedge on a paper (maybe a compass or a protractor, but not with this or that graphics software).