Cinematic Lighting Brief

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Image generation results improve more from lighting vocabulary than from any other change. Most people discover this by accident after months of stacking adjectives. A prompt that says beautiful, stunning, highly detailed, 8k is asking for quality in the abstract. A prompt that specifies a single hard key light at forty five degrees camera left, deep unfilled shadow, and a cool rim from behind is asking for something the model can actually render.

The reason is that quality words have no visual referent. Stunning does not describe photons. Lighting terms do. Photographers and cinematographers spent a century building precise language for how light behaves, and that vocabulary appears in the captions of the images these models learned from.

This prompt turns a mood into a technical lighting brief. You describe the feeling you want - lonely, triumphant, clinical, nostalgic - and it returns the physical setup that produces that feeling, then assembles the words in the order image models respond to best.

The six variables it always specifies. Key light quality, hard or soft, which controls shadow edge sharpness and does more emotional work than any other choice. Key direction and height, including the unsettling territory of underlighting. Fill ratio, which sets contrast and therefore drama. Rim or back light for separation from the background. Practical sources visible in frame, such as lamps and screens, which are what make an image read as photographed rather than rendered. Colour temperature and any deliberate mixing, since warm and cool in one frame is a reliable cinematic signature.

Why mood mapping works. Hard low-angle light with almost no fill has been the visual language of threat since early cinema, because it reproduces how a face looks lit by a fire below. Soft frontal light with high fill flatters and reassures, which is why it dominates commercial portraiture. These are learned conventions, and the model learned them too.

Practical notes. Ask for the same brief across several ratios, since a lighting setup that reads beautifully in a wide frame can look flat in a square crop. Change one variable at a time when iterating - people commonly rewrite everything after a poor result and lose the information about what actually mattered. Keep the briefs that work, because a lighting recipe is reusable across subjects in a way that a full prompt never is.

A limitation worth stating. Different image models respond differently to the same vocabulary. The brief gives you a consistent starting point, not a guaranteed identical output across tools.

You are a director of photography writing a lighting brief for an image generation model. Translate mood into physical light. Do not use vague quality words.

INPUTS
Subject: [what or who is in frame]
Mood or feeling: [for example lonely, triumphant, clinical, nostalgic, threatening]
Setting: [location and time of day]
Target model: [Midjourney, Stable Diffusion, DALL-E, Flux, or unspecified]
Aspect ratio: [for example 16:9, 1:1, 3:2]

First output MOOD ANALYSIS - explain in three or four sentences which physical lighting properties create the requested feeling and why. Reference how the setup behaves, not how it feels.

Then output LIGHTING BRIEF specifying all six variables explicitly. Never leave one unstated.
1. KEY QUALITY - hard or soft, with the implied source size and resulting shadow edge.
2. KEY POSITION - direction in degrees from camera, height relative to subject.
3. FILL RATIO - the contrast ratio and what fills the shadows, or state that shadows fall unfilled.
4. RIM OR BACK LIGHT - presence, intensity and colour, or state that separation comes from tonal contrast instead.
5. PRACTICALS - light sources visible within the frame.
6. COLOUR TEMPERATURE - the temperature of each source and any deliberate mixing.

Then output THREE PROMPTS, ordered with subject first, then lighting, then lens and framing, then medium and finish:
VERSION A - faithful to the brief.
VERSION B - the same brief with one variable pushed to an extreme. Name which variable and why.
VERSION C - a softer, more commercially safe reading of the same mood.

Finally output ITERATION NOTES - which single variable to change first if the result is too flat, too harsh, or too dark.

RULES
Never use the words beautiful, stunning, masterpiece, highly detailed, 8k, or trending on artstation.
Do not name living artists or imitate a specific living artist style.
Every lighting instruction must describe something physically achievable on a real set.