A static image can suggest movement even when nothing is actually moving. A running pose or a dynamic line is not enough on its own. The direction of the light, the length of the shadow, the distribution of tones, and the depth of the background all help decide whether the image remains flat or begins to feel like a space the viewer can enter.

How light and shadow create depth and movement in illustration

One of the most important roles of light and shadow is to create a sense of space on a flat surface. When a character has a cast shadow beneath them, when the background gradually becomes lighter or darker, or when objects are separated by tone, the viewer can more easily understand what is in front, what is behind, and how the elements of the image relate to one another.

This is especially important in picture book illustration and story-driven images. A child or reader may not consciously analyse the direction of the light, but they will still feel when a scene is uncertain. If a character seems to float in front of the background, if the shadow does not connect to the body, or if every element carries the same visual weight, the image becomes less convincing.

A good shadow is not just a darker patch on the image. It creates a relationship between the character, the ground, and the surrounding space.

The first step in creating space: the direction of light

For shadows to make visual sense, the direction of the light needs to remain consistent. Not everything has to be constructed with technical precision, but the image needs an internal logic. If the character’s face is lit from the left, while the cast shadow points in a completely unrelated direction, the scene can easily lose its structure.

The direction of light also helps decide how we read the image. Side light can highlight a character’s face while leaving the other side of the body in softer shadow. Backlight can give the figure a clear outline. Light from below, on the other hand, feels more unusual and often creates a more tense or fairy-tale-like effect.

Cast shadow: when the character truly stands in the scene

A cast shadow is important because it connects a character or object to its environment. Without a shadow, a figure can easily look as if it has been pasted onto the background. A well-placed shadow, with the right direction and strength, shows where the character stands, how close they are to the ground, and how they relate to the surrounding space.

Not every scene needs a strong shadow. In a soft, fairy-tale-like interior, a subtle tone beneath the character’s feet may be enough. In a sunny courtyard, however, a clearer cast shadow can make the space feel more real. The important question is always whether the shadow helps the reader understand the scene.

How can a still image suggest movement?

A sense of movement does not come only from the pose of the character. A running, jumping, or turning figure works best when the light and shadow support the direction of the action. A longer shadow, a tone pulled to one side, a light-dark rhythm in the background, or a subtle darkening behind the motion can all help give the scene momentum.

For example, the distance between a jumping character and their shadow immediately tells us how high the figure has risen. With a running character, a darker background behind the body or a brighter area ahead can suggest the direction of movement. These are small visual decisions, but they strongly influence whether the image feels like a fixed pose or a captured moment.

Depth in the background: not every detail needs equal strength

The sense of space does not depend only on the character’s shadow. The tones of the background matter just as much. If every tree, house, cloud, or object appears with the same strength, the image can become crowded and lose depth. More distant elements can often be softer, lighter, or less contrasty so that the foreground can come forward more clearly.

This does not mean the background has to be empty. It means that each detail needs a role. Elements that belong to the story can remain more pronounced. Elements that mainly create atmosphere or spatial depth can be more restrained. This way, the image becomes not only detailed, but also easier to read.

When does shadow become too much?

Shadow can easily be overworked. If every form receives a heavy dark edge or an overly strong shadow, the image can become stiff. If every shadow is too soft, the scene may lose its spatial structure. The best solution is usually not more shadow, but more precise shadow.

• The main figure should have the clearest spatial support. The viewer needs to feel where the character is standing or moving.
• Background shadows should not steal attention. Too much contrast in the background can compete with the character.
• The direction of light should remain readable. Space feels convincing when the shadows follow the same visual logic.

Light and shadow are therefore not separate decorative effects. They build the spatial structure of the image. They show where the character is, how the space opens up, which detail matters, and with what kind of momentum we continue reading the scene.

That is why, in illustration, the real question is not simply whether to use shading. The more useful question is what the shadow does in the image: does it support the character, add depth to the background, guide the movement, or merely make the surface darker?

This topic is closely connected to basic shading methods as well. In the related article, you can read more about how light and shadow work in illustration: Basic shading and light.

Author: Ágnes Ujréti
illustrator and graphic designer - Galantusz Grafika, 2026