FLUX 3 Klein Prompt Pack: 20 Prompts + Editing Examples

Updated Oct 17, 2026 · 5 min read

How to prompt Klein (two rules)

• Describe, don't tag. FLUX-family models respond to natural sentences better than comma-stacked keyword lists. Write the shot like you'd brief a photographer.
• Fewer steps is the default. Klein is distilled — start from the ComfyUI template's step count rather than FLUX.1 habits. If results look under-cooked, raise steps modestly before rewriting the prompt.

Every prompt below is written to be copied as-is at 1MP. Swap the bracketed parts.

Portraits (5)

1. A candid portrait of a woman in her 60s laughing at a kitchen table, morning window light from the left, 85mm lens, shallow depth of field, natural skin texture.
2. Studio headshot of a young man with short curly hair, charcoal background, soft key light and a rim light, neutral expression, corporate but warm.
3. Close-up of a street musician mid-song, eyes closed, warm tungsten stage light, slight motion blur on the hands, film grain.
4. Three friends in their 20s on a rooftop at blue hour, city lights behind them, one holding a sparkler, wide-angle, genuine laughter.
5. A child in a yellow raincoat looking up at falling rain, overcast soft light, puddle reflection, shot from slightly above.

Scenes & environments (5)

1. A narrow alley in Lisbon at golden hour, laundry lines overhead, tiled facades, a cat on a doorstep, 35mm, warm tones.
2. Interior of a small independent bookshop, wooden shelves to the ceiling, a reading lamp on, dust in a sunbeam, cozy and cluttered.
3. A mountain lake at dawn with mist on the water, a single wooden rowboat, pine forest, mirror-still reflection, muted blues and greens.
4. A night market food stall with steam rising, hanging lanterns, hands plating noodles, neon signage out of focus behind.
5. An abandoned greenhouse overtaken by ferns and vines, broken glass panels, shafts of afternoon light, photorealistic.

Product & commercial (5)

1. Matte black wireless headphones on a slab of raw concrete, single soft overhead light, dark gradient background, product photography, no text.
2. A ceramic coffee mug with a sage-green glaze on a linen cloth, morning light, a few coffee beans scattered, minimal, catalog style.
3. A pair of white leather sneakers floating at a slight angle on a pastel blue backdrop, soft shadow beneath, e-commerce hero shot.
4. A glass bottle of amber perfume on wet black stone, water droplets, one hard light creating a caustic highlight, luxury advertising.
5. A stack of three hardcover books with blank spines on a walnut desk beside a brass lamp, editorial still life.

Styles & illustration (5)

1. A fox in a snowy forest, flat vector illustration, limited palette of navy, cream and rust, clean shapes, no outlines.
2. A retro-futuristic city skyline, 1970s sci-fi paperback cover style, airbrushed gradients, bold composition.
3. Watercolor painting of a fishing village at low tide, loose brushwork, visible paper texture, soft bleeding edges.
4. Isometric cutaway of a tiny two-story cabin, cozy interior visible, low-poly 3D render, pastel lighting.
5. Ink-and-wash illustration of a heron standing in reeds, Japanese sumi-e style, lots of negative space.

Multi-reference editing prompts (Klein's headline feature)

Klein accepts a prompt plus up to 10 reference images. These prompts assume you've attached references in the editing workflow (see setup):

• (1 ref: a product photo) — Place this exact product on a marble kitchen counter with morning light, keep the label and proportions identical.
• (2 refs: a person, a jacket) — Dress the person from the first image in the jacket from the second, keep the face, pose and background unchanged.
• (1 ref: a room) — Repaint the walls a deep teal and replace the rug with a cream wool rug; keep furniture and lighting as they are.
• (3 refs: three sketches of a character) — Render this character as a consistent 3D-styled figure in a neutral pose, matching the design across all references.

The habit that matters: say what to keep as explicitly as what to change — multi-reference edits drift when the prompt only describes the change.