Three-point perspective adds a third vanishing point — above or below the horizon — so vertical lines also converge, creating a dramatic looking-up or looking-down view.
It's what makes a skyscraper feel like it's towering over you, or a character feel small and vulnerable — the go-to setup for dramatic, cinematic compositions.
Decide if you’re looking up (worm’s eye) or down (bird’s eye) at your subject.
As in two-point perspective, put one on the horizon to the left and one to the right.
Far above the page if looking up, or far below it if looking down.
A single line angled slightly toward the third vanishing point, not perfectly vertical.
Build out each face of your form, converging lines toward all three vanishing points.
Push far-away edges lighter and lower-contrast to sell the sense of extreme depth.
Sketch a tall building from street level looking straight up — notice how even the corners of the building lean inward as they rise.