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[Subject] A single young adult woman with fair skin and a slim build seated indoors on a brushed metal stool, facing the camera with a calm playful expression and a slight closed-mouth smile. She has large light-colored eyes, defined brows, round wire-frame eyeglasses, silver hoop earrings, and long dark hair styled in a high ponytail. With her right hand she lifts and holds the ponytail out to the side, adding a casual teasing gesture. She wears a dark navy-black satin slip dress with thin spaghetti straps and a soft sheen, fitted through the torso and falling below the knees. A wide black belt with a large rectangular buckle cinches the waist. Her left hand rests lightly on her lap.

[Environment] Minimal industrial interior with a rough gray concrete or plaster wall behind the subject. On both the left and right edges are dark audio speakers or amplifier cabinets, suggesting a studio, rehearsal space, or loft-like creative room. The floor is dark and plain, with no decorative furniture. The setting feels stripped-back and utilitarian.

[Composition/Camera] Vertical portrait framing, medium-full shot capturing the woman from head to below the knees while seated. Subject centered slightly left, stool fully visible, speaker cabinets anchoring the edges of the frame. Camera at about seated eye level or slightly above waist height, straight-on composition. Mild wide-to-normal lens feel around 35mm to 50mm equivalent. The pose is static but animated by the lifted ponytail, creating asymmetry against the simple background.

[Lighting] Strong direct on-camera flash creates a crisp candid snapshot look with bright frontal illumination, hard-edged shadow falloff, and strong sheen on the satin dress. The flash makes the skin bright and clean, highlights the metal stool edges, and separates the subject clearly from the gray wall. Ambient light is low and subdued, leaving the flash as the dominant source.

[Style/Rendering] Realistic direct-flash editorial portrait with indie studio energy, low-key industrial backdrop, fashion-meets-candid styling, clean skin retouching, visible fabric sheen, and an intentionally simple room. Social-media fashion portrait that feels contemporary, a little raw, and self-aware rather than polished in a luxury way.

[Detail constraints] Keep exactly one woman only, seated on a metal stool, wearing a dark satin spaghetti-strap dress with a wide black waist belt. Preserve the glasses, hoop earrings, high ponytail held out to the side, gray industrial wall, and speaker cabinets on the sides. Maintain the direct-flash look and minimal room styling. Do not turn the scene into a bedroom, restaurant, or soft daylight interior.

Negative prompt: extra people, couch or bed, luxury glam room, no belt, different dress color, smartphone selfie, missing glasses, missing stool, polished studio backdrop, daylight window light, heavy neon, distorted hands, duplicated hair, cartoon rendering, overly romantic softness, microphone or instruments in hand, outdoor setting.

Suggested parameters: aspect ratio 4:5, lens 40mm, aperture f/4 look, moderate depth of field, 24-32 steps, CFG 6-7, sampler DPM++ 2M Karras or equivalent, style strength low, seed around 417652.

Delta prompt strategy:
1. If the satin dress loses sheen: add “dark satin slip dress with soft reflective highlights from direct flash”.
2. If the belt disappears: add “wide black waist belt with a large rectangular buckle cinching the dress”.
3. If the pose changes: add “seated on a metal stool, one hand resting on lap, the other hand lifting the high ponytail outward”.
4. If the industrial setting weakens: add “rough gray concrete wall with speaker cabinets at both sides of the frame”.
5. If the flash look softens: add “strong direct on-camera flash with crisp frontal illumination and shallow room ambience”.
6. If glasses are missing: add “round wire-frame eyeglasses visible on the face”.
7. If the stool changes: add “simple square metal stool with worn industrial finish”.
8. If the image becomes too glamorous: add “raw studio snapshot mood, minimal set, candid fashion attitude”.
9. If the framing goes too tight: add “vertical medium-full portrait showing the seated pose and full stool”.
10. If the hair gesture is lost: add “right hand holding the ponytail out to the side as a playful styling detail”.