Why foreshortening breaks your drawings, and how to fix it — measuring, overlap, cross-contour, and using multi-angle photo reference to study extreme angles.
You draw the figure from the side and it works. Three-quarters, still fine. Then the pose asks for an arm coming straight at the viewer, and the drawing falls apart in a very specific way: the arm comes out too long. Not slightly — obviously too long, like a limb borrowed from a much taller person. You shorten it, and now it reads as a stump. Somewhere between those two failures is the correct drawing, and you cannot find it by feel.
That is foreshortening: the most reliable place where drawing from knowledge beats drawing from observation — badly.
Your brain is not a camera, it is a labelling machine. When you look at a model whose forearm points directly at you, your eyes receive a small ellipse with a hand attached. Your brain receives something else entirely: “arm.” And “arm” comes with a stored length. You have drawn hundreds of arms and every one of them was long, so your hand starts drawing the long one before your eye gets a vote.
This is object constancy, and it does you a favour everywhere else in life — it keeps a coffee cup the same size when you walk away from it. In drawing, it quietly overwrites the shape on your retina with the shape in your memory. That is why foreshortening errors are so consistent in direction: almost nobody draws a foreshortened limb too short.
The fix is not “look harder.” The fix is to stop trusting the label and start using procedures that produce a measurement your brain cannot argue with.
Pick one unit inside the drawing and compare everything to it. The head is traditional, but a foreshortened figure often hides the head — so use whatever is clearly visible and roughly perpendicular to your line of sight: shoulder width, the upper arm you can see, chin to sternum. That is your constant.
Then ask a comparative question, out loud if it helps: is the foreshortened thigh longer or shorter than the shoulder width? Not “how long is the thigh” — your symbol answers that one instantly and wrongly. A comparison forces you to look at two things at once and gives you a ratio you can check.
Use a held-up pencil from life, or a straight edge on screen from photo reference. Most people are astonished the first time: the thigh that felt like “two heads” measures barely one.
Published 2026-07-24 on the Refimages blog.