35. Three point perspective

Описание: Two vanishing points (VPs) in 3-point perspective are on eye level and the vertical VP is above or below, between the 2 VPs. The angle at the vertical VP must be less than 90 degrees. To find the center of vision (CV), draw lines from each VP perpendicular to the opposite side. Where the three lines meet is the CV. If the vertical angle is almost 90 degrees, then the CV is low because the viewer is looking down. He sees the top of the object with rapidly-converging lines, but he doesn't see eye level. If the vertical angle is very small, then the CV is close to eye level so the box almost looks like it's in two-point perspective. The viewer is barely looking down, so he mainly sees the sides of the box rather than its top or bottom.
I show you how to draw a box in 3-point perspective. I discuss the characteristics of a large box close to the viewer versus a smaller box further away. I describe the differences when your VPs form an equilateral triangle versus a non-equilateral triangle. And I show you how to roughly convert a 1-point perspective box into 3-point perspective.