The recipe
The shot never describes the person. It describes what is happening to them, which is what keeps the face out of the variables.
Getting it right
Composed
The locked line comes from the character sheet; everything after it comes from the recipe above. Swap in your own line and nothing else changes.
Midjourney
Backlit photograph of a woman, late twenties, Southern European features, an oval face, amber almond eyes, feathered brows, a straight nose, evenly balanced lips, a scatter of freckles across the nose and cheeks, mid-back length wavy chestnut hair with a curtain fringe, light olive skin, heavily freckled, slightly below average height with a slight build. Wearing loose bohemian layers, a warm neutral palette of sand, bone and camel, in open ground under a broad sky, low golden-hour sun, camera at eye level. Waist up, shot on a 135mm at f/2.8. Low sun behind and slightly left, rim light along the jaw and hair, face lifted, half smile. Warm haze, gentle lens flare across the top third, background compressed --ar 2:3 --style raw --seed 2908186238 --cref [url of your approved reference frame] --cw 100
Flux
Backlit photograph of a woman, late twenties, Southern European features, an oval face, amber almond eyes, feathered brows, a straight nose, evenly balanced lips, a scatter of freckles across the nose and cheeks, mid-back length wavy chestnut hair with a curtain fringe, light olive skin, heavily freckled, slightly below average height with a slight build. Wearing loose bohemian layers, a warm neutral palette of sand, bone and camel, in open ground under a broad sky, low golden-hour sun, camera at eye level. Waist up, shot on a 135mm at f/2.8. Low sun behind and slightly left, rim light along the jaw and hair, face lifted, half smile. Warm haze, gentle lens flare across the top third, background compressed negative: beauty filter, airbrushed skin, plastic skin, waxy skin, over-smoothed, perfectly symmetrical face, extra fingers, malformed hands, warped jewellery, text artifacts, watermark, logo on clothing, duplicate person, changing facial structure, clear skin, freckles removed, clear skin seed: 2908186238 | guidance: 3.5 | steps: 28
Seedream
Backlit photograph of a woman, late twenties, Southern European features, an oval face, amber almond eyes, feathered brows, a straight nose, evenly balanced lips, a scatter of freckles across the nose and cheeks, mid-back length wavy chestnut hair with a curtain fringe, light olive skin, heavily freckled, slightly below average height with a slight build. Wearing loose bohemian layers, a warm neutral palette of sand, bone and camel, in open ground under a broad sky, low golden-hour sun, camera at eye level. Waist up, shot on a 135mm at f/2.8. Low sun behind and slightly left, rim light along the jaw and hair, face lifted, half smile. Warm haze, gentle lens flare across the top third, background compressed Keep identical: a woman, late twenties, Southern European features, an oval face, amber almond eyes, feathered brows, a straight nose, evenly balanced lips, a scatter of freckles across the nose and cheeks, mid-back length wavy chestnut hair with a curtain fringe, light olive skin, heavily freckled, slightly below average height with a slight build Change only: [the one thing that changes in this shot]
Portrait
Head and shoulders, centred, shot on an 85mm at f/2
Tight head and shoulders, shot on a 50mm at f/4
Chest up, slightly off-centre, shot on a 35mm at f/1.8
Head and shoulders, shot on a 35mm at f/1.4
Full profile, then a three-quarter turn, matched framing