Lighting

Backlighting places the light behind the subject, facing the camera: it outlines hair and shoulders, separates the figure from the background, makes smoke and dust glow and, with no light from the front, turns people into silhouettes.

Fill light is a softer, weaker source on the side opposite the key that lifts the shadows the key creates; its level relative to the key — the lighting ratio — decides whether a face looks open and bright or moody and sculpted.

Hard light comes from a small or distant source — a bare bulb, an open fresnel, the midday sun — and throws crisp, sharp-edged shadows with an abrupt jump from light to dark.

High-key lighting is bright and even, with plenty of fill and a low key-to-fill ratio, so the frame is dominated by light tones and gentle shadows — the look of sitcoms, comedies, commercials and dreamlike heavens.

The key light is the main light on a subject: it sets the direction, hardness and color of the illumination, and every other source — fill, back, practicals — is balanced against it.

Low-key lighting keeps most of the frame in shadow, with a strong key, little or no fill and a high lighting ratio, so only fragments of faces and objects emerge from the dark — the language of noir, thrillers and horror.

Golden hour — which filmmakers call magic hour — is the short window after sunrise and before sunset when the low sun gives warm, soft, raking light and long shadows; crews often keep shooting into the blue twilight that follows.

Practical lighting uses light sources visible in the shot — table lamps, neon signs, candles, TV screens — either as the real illumination or as the visible motivation for hidden film lights.

Rembrandt lighting places the key high and about 45° to one side, so the far cheek falls into shadow except for a small triangle of light under the eye — a moody, painterly portrait look named after the Dutch painter.

A silhouette shows a subject as a dark, featureless shape against a brighter background — sky, window, fire — exposed for the background, so only the outline tells us who they are and what they are doing.

Soft light comes from a source that is large relative to the subject — an overcast sky, a big window, a bounced or diffused lamp — and wraps around forms with gradual, feathered transitions from light to shadow.

Chiaroscuro, borrowed from Renaissance and Baroque painting, is dramatic modelling with strong light and deep shadow — usually one hard side or top source carving faces out of darkness — the backbone of German Expressionism and film noir.

Color temperature describes how warm or cool a light source is, measured in kelvin: candlelight around 1900K, tungsten about 3200K, daylight about 5600K, overcast and shade higher still.

Natural light is light from the sun, sky and moon rather than from lamps; its direction, color and softness change with the hour and the weather, and shooting with it is a hallmark of realist cinema.

Neon lighting builds a scene from saturated colored tubes and signs — pinks, cyans, reds — reflected on wet streets and faces against deep shadow, a look tied to Hong Kong cinema and neo-noir.

Ambient (available) light is whatever light already exists at a location — sun through windows, street lamps, shop signs — before the crew adds its own; DPs either shoot with it as it is or shape and supplement it.

Bounce lighting aims a lamp — or the sun — at a white board, foam core, wall or ceiling instead of at the subject, turning a hard source into a broad, soft fill that wraps around faces.

Butterfly lighting puts the key light high and straight in front of the face, casting a small butterfly-shaped shadow under the nose; it sculpts cheekbones and was the classic Hollywood glamour look.

A catchlight is the reflection of a light source in a subject's eyes; its shape and position reveal the lighting and make eyes look alive, while its absence reads as dead, cold or menacing.

Contrast is the difference between the brightest and darkest parts of an image — set on set by the ratio between key and fill — and ranges from flat, gentle low contrast to hard, graphic high contrast.

Day for night shoots night scenes in daylight and sells them as night by underexposing, keeping the sun behind the actors as a 'moon', avoiding the sky and grading everything dark and cool.

Diffusion is any translucent material — silk, frost, grid cloth, a softbox front — placed between a lamp and the subject to spread the light over a larger area, softening shadows and wrapping light around faces.

A rim (edge) light sits behind and to the side of the subject, drawing a thin bright line along the edge of the head, shoulders or profile to pull it off a dark background.

Gels are sheets of heat-resistant colored film clipped over lamps: correction gels (CTO, CTB) match sources to tungsten or daylight, while saturated gels paint a scene red, magenta or blue.

Haze is a fine artificial smoke pumped onto the set so light becomes visible: beams and shafts appear, contrast drops and the background recedes into a soft, atmospheric glow.

Mixed lighting combines sources of different color temperature or spectrum in one scene — window daylight with tungsten lamps, fluorescent with neon — either corrected with gels or kept as a deliberate warm-cool contrast.

Moonlight lighting imitates the moon with a single high, directional source — usually cool or neutral, often from behind — plus controlled underexposure, so the scene reads as night while faces and space stay legible.

Side lighting puts the key roughly 90° to the side of the subject, splitting the face into light and shadow and raking across texture — the most direct way to reveal volume and inner conflict.

Top lighting comes from directly overhead, lighting heads and shoulders while sinking the eyes into dark sockets — as Gordon Willis did with Marlon Brando in The Godfather; it suggests midday sun, interrogation rooms or characters we cannot read.

Under lighting places the key below the face, reversing the natural direction of daylight: shadows climb upward from nose and brows, making faces look uncanny, sinister or theatrical — unless motivated by a campfire or a screen.

A cucoloris (cookie) is a panel with irregular cut-outs placed in front of a light to throw a broken pattern of light and shadow — leaves, branches, abstract dapples — across walls or faces, breaking up flat illumination.

Firelight is light from — or imitating — flames: candles, fireplaces, torches, campfires; warm, low and flickering, it falls off quickly into darkness, and on set is often faked with flicker effects on dimmed tungsten lamps.

Water reflection lighting bounces a lamp off a moving water surface — a pool, a tray, a mirror in water — so rippling caustic patterns dance across walls and faces, suggesting water, dreams or an unstable inner world.