Variance

What we ran

Four prompts: the bartender, the sprinkler, the newsroom, the octopus. Each written three ways — one line, a paragraph, a full brief — and each version run four times with nothing changed. FLUX.3, draft quality, 21:9, sound on.

1A dog runs through a garden sprinkler on a hot afternoon, in one continuous 8-second take.2 3ACTION — An oscillating sprinkler sweeps left to right across a suburban back lawn. A golden retriever, already soaked, charges into the arc at full speed, jaws snapping at the water and missing. It overruns, skids on the wet grass with all four legs sliding, wheels around in a spray of water and torn turf, and comes straight back through the arc the other way — this time catching a mouthful and shaking its head violently as it emerges. Water sheets off its coat with every stride.4 5SUBJECT — A young golden retriever, coat darkened and spiked with water, absolutely committed, mouth open, ears flying. Not a trained performance — a genuinely overstimulated dog.6 7SETTING — An ordinary back garden: mown grass with two worn patches, a wooden fence, a trampoline in the far corner, a hose snaking back to a tap. Nobody else in frame.8 9CAMERA & LIGHT — 35mm at grass height, camera low enough that the dog crosses above the lens, tracking laterally to hold it in frame. Hard low sun from behind the sprinkler so every droplet is backlit and the spray reads as a wall of white light; the dog is largely in silhouette on the way in and fully lit on the way back.10 11SOUND — The sprinkler's mechanical tick and the rising hiss of each sweep, paws slapping wet grass, the heavy shake of a wet coat, one short bark, and the constant background of a summer afternoon.12 13GRADE — Saturated summer green, hot white specular highlights on every water droplet, slight lens flare from the low sun, fine grain.

The board holds 47 takes and 45 of them carry a file. The bartender's full brief only rendered takes 1 and 4 (n=9, n=10); the newsroom's paragraph only takes 1, 2 and 4 (n=27–n=29). Everything below comes from those 45. We pulled frames from every take at matched timestamps — 1s, mid, and one second before the end — and read the four takes of each prompt side by side.

1An octopus opens a screw-top jar from the inside, 8 seconds, in close observational detail.2 3ACTION — A common octopus is sealed inside a large glass jar resting on a sandy tank floor. It begins pressed into the bottom third, then unfurls: arms spreading flat against the curved inner wall, suckers sequentially adhering with visible individual grip. Two arms locate the lid and take purchase around its inner rim. It applies torque — the whole animal counter-rotates slightly against the glass as it works — and the lid moves a quarter turn, stops, and moves again. On the third effort the seal breaks with a visible pulse of bubbles, and the octopus immediately pours itself through the gap, changing colour from mottled red-brown to pale as it exits.4 5SUBJECT — Every sucker acts independently and visibly. The skin texture changes continuously — papillae rising and flattening — and the animal's colour shifts twice during the sequence.6 7SETTING — A research aquarium tank: fine pale sand, one piece of coral rubble, a bare glass back wall.8 9CAMERA & LIGHT — 100mm macro, locked off, focused on the lid and the arms working it, with the body soft behind the curved glass. Overhead aquarium light only, so the sand is bright and the water column above goes to deep blue-green. Refraction through the jar visibly distorts everything behind it.10 11SOUND — Muffled underwater room tone with a low filtration hum, the dull granular squeak of glass turning against glass, a soft rush of bubbles at the moment the seal breaks.12 13GRADE — Cool blue-green water against warm sand, high clarity, fine particulate catching the light, slight chromatic aberration at the jar's edges.

What happened

The world holds. The people don't.

Nothing in the 70-character bartender prompt — "A bartender builds a martini: ice, stir, strain, two olives on a pick." — says bar, or night, or lighting. All ten bartender takes are a dark wood bar at night, one warm source overhead, a wall of bottles thrown out of focus behind. All ten run the beats in order: ice, stir, strain, garnish. All ten end on a stemmed glass with a pick in it. "A dog runs through a garden sprinkler on a summer afternoon" returns a golden retriever four times out of four (n=11–n=14); the prompt never names a breed.

What moves is everything you'd cast or shoot. The four newsroom briefs (n=30–n=33) are a different woman each time. The one-line newsroom prompt doesn't say who's on camera, so the reroll decides: n=24 and n=26 field a woman, n=25 fields a man, and n=23 opens on a male anchor at a studio desk before cutting to the street. Same for the balloon — a duck in n=23, an orange cat in n=24 and n=26, a tiger in n=25. Shot size drifts hardest: n=1 stays locked in macro on the mixing glass for its whole run while n=2, n=3 and n=4 cut from a wide to the same macro and back out to the finished drink.

1A 1987 local news report about a runaway parade balloon, 8 seconds, in the exact grammar of a period news package.2 3ACTION — A field reporter stands mid-frame in a wind-blown high street holding a stick microphone with a station flag on it, delivering a piece to camera. Behind her, an enormous inflatable cartoon character — three storeys tall, straining sideways — is dragging eight handlers bodily down the road, their ropes at forty-five degrees. One handler lets go and sits down hard. The reporter's hair is being flattened across her face by the same wind. She glances over her shoulder at exactly the moment the balloon's head strikes a lamp standard, turns back to camera, and carries on without breaking sentence.4 5SUBJECT — Late thirties, shoulder-padded red blazer, big hair losing its battle with the wind, holding the mic exactly the regulation distance from her chin. Utterly professional; the only tell is that she raises her voice a notch after the glance.6 7SETTING — A provincial high street, period shopfronts, bunting, a crowd pressed to both kerbs, police in period uniform waving people back. FORMAT &8 9CAMERA — Shot on a 1987 broadcast tube camera: soft image, smeared reds, highlights blooming and trailing, slight geometric distortion at the frame edges. Locked-off shoulder-height framing that reframes once, late and clumsily, to keep the balloon in shot. A period lower-third name strap fades in and out.10 11SOUND — Heavy wind buffet directly on the microphone capsule, crowd noise, distant marching band, the reporter's level trained delivery riding above it all.12 13GRADE — Washed-out video colour, low contrast, slightly green in the greys, visible tape noise.

Anything the model has to invent, it re-invents. The full newsroom brief asks for "a period lower-third name strap" and never gives a name. So it writes one: JANE WILKES (n=31), JANE WILSON (n=32 and n=33, with different station bugs), and in n=30 the strap reads "[REPORTER NAME] / HIGH STREET" — it rendered the placeholder. The paragraph version invents JANET MILLER, JANE MILLER and KAREN MILLER across its three takes (n=27–n=29).

Counts are soft. "Drops in two olives on a steel pick" holds in eight of the ten bartender takes. n=3 and n=7 put three on the pick.

1A bartender builds a martini behind a dark wood bar at night. He fills a mixing glass with cracked ice, pours gin and a short measure of vermouth, and stirs for a slow ten seconds with a bar spoon, never letting the spoon rattle. He strains into a chilled coupe held at an angle, drops in two olives on a steel pick, and slides it forward without looking up. Warm low key light from a single pendant above the bar, bottles glittering out of focus behind him. Handheld medium close on his hands. Audio: ice ringing on glass, the strain, the pick against the rim.

Runtime and frame wobble too. The four one-line bartender takes came back at 15.04s, 10.04s, 10.04s and 10.04s. The newsroom's one-liner ran 8.04s three times and 10.04s once (n=26). And n=33 mattes its own sides — 54px of black left, 57px right, a 2.19:1 image inside a 2.37:1 file — which none of its three siblings do. The board doesn't record a per-take length or frame setting, so read those as observations, not mechanisms.

Direction collapses the look. This is the clearest result in the bin. At one line, the sprinkler changes fence, sun angle and camera height every take. At full brief (n=19–n=22) all four are the same low backlit set-up, and the props the brief asks for turn up every time: the trampoline in "a trampoline in the far corner" is present in all four takes — never in the same corner — and the "hose snaking back to a tap" in three. The bartender paragraph (n=5–n=8) is close to a locked-off shot repeated four times.

Direction does not collapse the ending. The octopus proves it, and it's the finding worth paying for. The full brief (n=42–n=45) produces the most consistent look in the whole family — the same research tank, the same single piece of coral rubble at frame left, the same overhead light in all four takes — and the worst hit rate. n=45 never opens the jar: lid screwed on at 1s, 4s, 7s and on the final frame. n=44 starts with the octopus already outside the jar and spends the shot reaching in. Only two of four read as the thing we asked for. The paragraph version (n=38–n=41), at a quarter of the words, gets three clean escapes out of four.

1An octopus opens a screw-top jar from the inside. A common octopus is sealed inside a glass jar on a sandy tank floor. It spreads its arms flat against the inner wall, finds the lid, and works it around a quarter-turn at a time until the seal breaks and it pours itself out. Aquarium light from above, blue-green water, fine particulate drifting. Macro lens on the suckers. Audio: muffled underwater room tone, the dull squeak of glass turning.

The reason is in the brief itself. It spends its eight seconds describing: arms spreading flat, suckers adhering, "the lid moves a quarter turn, stops, and moves again", and only then "on the third effort the seal breaks". The model renders the description and runs out of clip before the payoff. Detail buys you the look. It does not buy you seconds.

Notable takes

n=45 | Octopus, full brief, take 4 | The most directed prompt in the family, and the lid is still on at the last frame. n=30 | Newsroom, full brief, take 1 | The lower third reads "[REPORTER NAME]". It rendered the placeholder. n=25 | Newsroom, one line, take 3 | Identical prompt to n=24 and n=26; the reporter is a man. n=38 | Octopus, paragraph, take 1 | Opens it, pours out, jar on its side by 7s. The paragraph beat the brief. n=21 | Sprinkler, full brief, take 3 | Trampoline, hose, worn patches, backlit low sun. Every prop, fourth try as first. n=7 | Bartender, paragraph, take 3 | Framed like n=5, n=6 and n=8 almost to the pixel — with three olives instead of two.

1A 1987 local news report about a runaway parade balloon.

What this means if you're prompting FLUX.3

A reroll is for a face you don't like, a lens that sat too close, or an action that didn't finish. Press it again and those change.

A reroll is not for the location, the time of day, the grade or the casting type. Four takes of the same prompt will hand you the same bar, the same lawn, the same golden retriever. If the bar is too dark, write it lighter — don't burn four takes hoping.

Whatever you leave unsaid gets recast every time: gender, breed, station name, what the balloon is. Name it or it's a dice roll.

Don't let it write on screen unless you supply the words. It will invent a name, and once in four it will show you the brackets.

Numbers in a prompt are a preference, not a constraint. Two olives came back three twice in ten.

The beat you lose is the last one. If the shot has a payoff, put it early and cut the set-up — or accept that a longer, more beautiful brief buys you a more consistent frame around an action that doesn't land.

And on cost: on the octopus, the paragraph landed 3 of 4 and the full brief landed 2 of 4. Write the middle length and reroll. It is cheaper than writing more.