# Blue Hour — lighting technique | AIM Previz

https://aimpreviz.com/learn/techniques/blue-hour

[Previz](https://aimpreviz.com/) / [Techniques](https://aimpreviz.com/learn/techniques) / Lighting · Intermediate

# Blue Hour

Blue Hour is a lighting technique: The twilight window after the sun is gone but before full dark. Cool, even, and just bright enough to hold detail in the sky. In PREVIZ picking it sets the lighting mood in Keyframe, Director and Infinitum.

Published 29 Sep 2026Updated 4 Oct 2026by the PREVIZ team

What it does to the frame

The twilight window after the sun is gone but before full dark. Cool, even, and just bright enough to hold detail in the sky.

- **Reads as** — Nostalgic, Artistic
- **Difficulty** — Intermediate
- **Runs in** — Keyframe · Director · Infinitum

The control it moves in PREVIZ

- Lighting mood Director

  Blue Hour

  Cool twilight light with deep blue sky tones.

  Key-to-fill 1.5:1 · 6500K cool

  Best for: Melancholy, Transition scenes, Urban

Picking the technique sets these controls; it does not paste text into a prompt. The setting can be re-run, checked against the settings beside it, and carried into the next shot.

## Never with

These contradict Blue Hour on a physical dimension; the library refuses the pair rather than letting one silently win.

- **[Golden Hour](https://aimpreviz.com/learn/techniques/golden-hour)

Basic · Romantic, Nostalgic** — The hour after sunrise or before sunset. Low, warm, and very soft — flattering to almost everything, which is why it is worth the wait.
- **[Harsh Noon](https://aimpreviz.com/learn/techniques/harsh-noon)

Intermediate · Documentary, Dramatic** — Overhead midday sun. Short hard shadows and blown highlights — usually avoided, which is exactly why it reads as unglamorous and real.

## Also in lighting

Where the light comes from and what it leaves in shadow — the setups and the moods of the day and the night.

- **[Chiaroscuro](https://aimpreviz.com/learn/techniques/chiaroscuro)

Advanced · Dramatic, Artistic** — Extreme contrast between light and dark with very little in between. Borrowed from Baroque painting; the darkness does as much work as the light.
- **[Rembrandt Lighting](https://aimpreviz.com/learn/techniques/rembrandt-lighting)

Intermediate · Dramatic, Cinematic** — Key light high and to one side, leaving a small triangle of light on the shadowed cheek. The classical portrait setup.
- **[Split Lighting](https://aimpreviz.com/learn/techniques/split-lighting)

Intermediate · Dramatic, Horror** — The light comes from ninety degrees to the side, so half the face is lit and half is in shadow. Reads as division or duplicity.
- **[Butterfly Lighting](https://aimpreviz.com/learn/techniques/butterfly-lighting)

Intermediate · Romantic, Cinematic** — Key light high and dead centre, casting a small butterfly-shaped shadow under the nose. The classic glamour light.
- **[Rim Light](https://aimpreviz.com/learn/techniques/rim-light)

Basic · Cinematic, Dramatic** — Light from behind that traces a bright edge around the subject, separating them from the background. Almost every night exterior uses it.
- **[Silhouette](https://aimpreviz.com/learn/techniques/silhouette)

Intermediate · Artistic, Dramatic** — The subject is unlit against a bright background, reduced to outline. Identity withheld — shape carries the whole shot.
- **[Under-Lighting](https://aimpreviz.com/learn/techniques/under-lighting)

Basic · Horror** — Light from below the face, inverting every shadow you expect. The campfire-story look, and the fastest way to make a face read as wrong.
- **[Practical Light](https://aimpreviz.com/learn/techniques/practical-light)

Intermediate · Cinematic, Documentary** — The scene is lit by lamps, screens and signs that are visible in the shot. Motivated light — the viewer can see where it comes from.
- **[Neon Lighting](https://aimpreviz.com/learn/techniques/neon-lighting)

Intermediate · Cinematic, Artistic** — Saturated coloured light from signage, usually two clashing hues. The look of a city at night in almost every film made since 1982.
- **[Candlelight](https://aimpreviz.com/learn/techniques/candlelight)

Advanced · Romantic, Nostalgic** — Lit only by flame. Very warm, very soft, and falls off fast — faces glow and everything a metre away is gone.
- **[Moonlight](https://aimpreviz.com/learn/techniques/moonlight)

Intermediate · Horror, Artistic** — Cool, dim, directional light with deep shadows. Cinema's moonlight is a convention — real moonlight is far dimmer and has no colour at all.
- **[High Key](https://aimpreviz.com/learn/techniques/high-key)

Basic · Romantic, Documentary** — Bright and evenly lit with almost no shadow. The look of comedy, commercials and daytime television — nothing is hidden.

## Reads the same way

Other techniques that read as nostalgic or artistic — a light or a lens to pair with this move.

- **[Bird's Eye View](https://aimpreviz.com/learn/techniques/birds-eye)

Intermediate · Artistic, Cinematic** — Straight down from directly overhead. Flattens the scene into pattern and geometry, and detaches the viewer from the action entirely.
- **[Steep Overhead](https://aimpreviz.com/learn/techniques/overhead-steep)

Intermediate · Dramatic, Artistic** — Steeply down but not fully vertical. Keeps faces readable while a true bird's eye loses them — the usual choice when you want the detachment but still need performance.
- **[Profile Shot](https://aimpreviz.com/learn/techniques/profile-shot)

Basic · Artistic, Dramatic** — Dead side-on, ninety degrees to the subject's facing. Reads as formal and observational — you are watching rather than being addressed.
- **[Extreme Wide Shot](https://aimpreviz.com/learn/techniques/extreme-wide)

Intermediate · Cinematic, Artistic** — The figure is small against the landscape. Scale is the subject — the person is there to give the environment a size.
- **[Locked Off](https://aimpreviz.com/learn/techniques/static-shot)

Basic · Artistic, Documentary** — The camera does not move at all. A deliberate choice, not an absence of one — stillness reads as composure or as unsettling patience.
- **[Vintage Glass](https://aimpreviz.com/learn/techniques/vintage-glass)

Intermediate · Nostalgic, Romantic** — Older uncoated lenses: lower contrast, swirling backgrounds and flares that bloom easily. Imperfection used deliberately.
- **[Tilt-Shift](https://aimpreviz.com/learn/techniques/tilt-shift-miniature)

Advanced · Artistic** — The focus plane is tilted off perpendicular, leaving a narrow band sharp across the frame. On a wide view it makes real places look like models.
- **[Halation](https://aimpreviz.com/learn/techniques/halation-glow)

Intermediate · Nostalgic, Cinematic** — A red bloom around bright lights, caused by light scattering back through film stock. The signature of tungsten film shot at night.
- **[Film Grain](https://aimpreviz.com/learn/techniques/film-grain)

Basic · Nostalgic, Documentary** — Visible photochemical texture. Reads as film rather than video, and hides the plastic smoothness generated images tend toward.
- **[Diffusion](https://aimpreviz.com/learn/techniques/diffusion-bloom)

Basic · Romantic, Nostalgic** — A filter that lifts blacks and blooms highlights, taking the edge off digital sharpness. The standard way to soften a face.

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