Join Victor Osaka for an in-depth discussion in this video What is perspective?, part of SketchBook Pro: Drawing One-Point Perspective.
So what is perspective and why is it so hard to learn? According to Google, perspective is the art of drawing solid objects on a two dimensional surface so as to give the right impression of the height, width, depth and position. Now that's a pretty good definition for our purpose. Even though you can perceive the world in perspective, your drawings, they look a little bit like children's drawings, or perhaps a little bit like cave drawings, neither of which use perspective correctly. So why is it so hard to learn to draw in perspective? Perspective drawing is recent in the history of mankind.
And although modern man has been here for the last 50,000 years, the first correct perspective drawing only appeared in the 14th century, only 500 years ago. It has taken some 40,000 years to grow the neurological connections to develop the skills to understand and draw in true perspective. Children, do not as cave men did not, have the neurological capacity to draw in true perspective. We still need to train ourselves to do this well. Yes, it can be difficult to draw on true perspective, but we're going to start learning it right now.