Pohlke — where it appears
Named by 3 essays across one field — each of them below, with the objects they name alongside it.
Any three lines you draw are a cube
This site has said, for four rungs, that cavalier projection is not the projection of anything — because its axis scales sum to three where every orthographic projection sums to two. That is true of orthographic projection and false of projection. Three lines from a point, drawn by hand, are a picture of an actual cube seen from an actual direction, and the cube and the direction come out of the drawing in closed form.
Oblique is a shear, and the shear is the whole system
Cavalier and cabinet are usually introduced as easy perspective for people with a set square. They are not a simplification of anything — they are the answer to a demand no orthographic projection can meet, which is a front face at true size and a depth axis at full length at the same time. The two are locked on a unit circle, and buying both costs exactly 45° of obliquity.
The drawing does not say which corner is nearer
The Necker cube is filed under optical illusion, as though the flipping were something the eye does. It is not: a parallel drawing of a cube is a drawing of exactly two cubes, mirror images of each other, and they project to the identical picture to the last bit. Perspective rules the second one out at a rate exactly inverse in the eye's distance, and never entirely.
Named alongside it
The objects these essays reach for when they reach for this one.
Drawing systemParallel projectionAxonometricDemonstrationDepth reversalOblique projectionOrthographicPlanometricAnisotropyDegeneracyDepth cueForeshortening