What Is Foreshortening? How Artists Show Depth

Imagine looking straight at a person's outstretched arm from the side. You can see most of its length. Now imagine the hand pointing directly toward you. The arm has not physically become shorter, but its visible length on the picture plane is greatly reduced. That visual compression is foreshortening.

The same effect happens with boxes, roads, legs, weapons, tables, and almost any object that turns in depth. Parts closer to you may appear larger, while lengths running directly toward you appear compressed. If an artist draws the object using its ordinary measured proportions without accounting for viewpoint, the result can look strangely stretched.

This is why foreshortening is really a question about viewpoint. You are not changing the object. You are changing how much of each dimension can be seen from a particular angle. Perspective turns real three-dimensional length into a shorter two-dimensional shape.

Your brain knows that an arm is long, a foot is smaller than a torso, and a circular plate is round. That knowledge can interfere with drawing what your eyes actually see. Beginners often draw the known shape instead of the observed shape, making a hand too small or a receding limb too long.

Overlapping forms provide important clues. If a knee sits in front of a thigh, or a hand covers part of an arm, that overlap tells the viewer which part is closer. Changes in scale, contour, and visible surface area also help. A cylinder pointing toward you may show more of its circular end and less of its length.

Learning about foreshortening therefore involves observation more than memorising a rule. Compare angles and distances on the page. Ask which forms overlap, which parts are closest, and which dimensions are compressed. The surprising shape you see is often more accurate than the familiar shape you expect.

A few simple exercises can train your eye without turning the practice into a long technical session:

• •Draw a cylinder from the side, then rotate it until one end points toward you.
• •Sketch your own hand reaching toward a mirror or camera.
• •Use simple boxes to practise long forms receding into space.
• •Compare the visible length of a limb at several different angles.
• •Check proportions by measuring what you see rather than what you think the object should look like.

One useful habit is to draw the biggest masses before details. If you are drawing a bent leg pointing toward you, start with simple boxes or cylinders for the thigh, shin, and foot. Check how much each form overlaps the next. Only then add muscles, clothing, or small contours.

When you study foreshortening in finished art, trace the depth direction mentally. Ask which part would be nearest if the picture came to life. Then notice how the artist uses size, overlap, and compressed length to make that depth readable.

One of the most striking early examples of foreshortening is Andrea Mantegna's Lamentation over the Dead Christ, painted in the late fifteenth century. The body lies on a slab with the soles of the feet facing you, so the whole figure recedes sharply into the picture. Interestingly, Mantegna did not follow the optics strictly. If he had, the feet would appear much larger and the head much smaller. He reduced the feet so they would not dominate, a reminder that artists often adjust accurate foreshortening to keep a picture readable and emotionally focused.

Mantegna also used foreshortening upwards. In the Camera degli Sposi, a room in the ducal palace in Mantua, he painted a ceiling that seems to open onto the sky, with figures and putti peering down over a balustrade as though seen from directly below. This approach became known as di sotto in su, meaning from below upwards. Baroque painters such as Andrea Pozzo, whose ceiling in the church of Sant'Ignazio in Rome seems to dissolve into heaven, later pushed the same idea to dramatic extremes.

There is a neat piece of geometry behind foreshortening. When a straight form tilts away from the flat picture plane, its visible length shrinks roughly in proportion to the cosine of the tilt angle. A 60 centimetre arm held flat across your view shows its full length. Turn it 60 degrees towards you and it appears about half as long, because the cosine of 60 degrees is 0.5. At 80 degrees it shows less than a fifth of its length, about 10 centimetres. The last few degrees of turning cause the most dramatic shortening, which is why limbs pointing almost straight at you are so hard to draw.

Real perspective adds a second effect on top of this, because the nearer end of a form also looks larger than the far end. Rather than calculating, artists measure. Hold a pencil at arm's length with your elbow locked, close one eye, line the pencil tip up with one end of the form and slide your thumb to mark the other end. Then compare that length with a reference, such as the height of the head, by moving the pencil without bending your arm. Keep your arm straight and the pencil square to your line of sight, or every measurement will change.

How strong foreshortening looks depends mainly on how close you are to the subject. Take a face. The tip of the nose sits roughly 10 centimetres in front of the ears. Viewed from 40 centimetres, the ears are a quarter further away than the nose, so the nose appears about 25 percent larger by comparison, the familiar distortion of a close-up selfie. From 3 metres, the same 10 centimetres is only about 3 percent of the distance, and the face looks natural. That is why portrait photographers usually stand well back and use a longer lens to fill the frame, rather than crowding in close.

A common belief is that telephoto lenses compress distance and wide-angle lenses distort it. In fact the lens only decides how much of the scene fits in the frame. The perspective comes from where the camera stands. A wide-angle photo taken from far away and then cropped shows exactly the same proportions as a telephoto image taken from the same spot. Artists can exploit this deliberately. Comic artists often imagine a viewpoint very close to a fist or a foot thrusting towards the reader, so it looms enormous, while a figure drawn as if seen from far away looks flatter and calmer.

Foreshortening is the apparent shortening of a form as it turns into depth. The trick is to trust the visible shape, use overlap and scale as clues, and simplify complicated subjects into basic forms first. With calm observation, dramatic perspective starts to feel less like a trick and more like ordinary seeing.