{
"identity": "the two people in the image are the SAME person at two ages. When the reader uploads two photos, the photo from TODAY defines the adult and the CHILDHOOD photo defines the child, and each one provides only its own face: from the adult, keep the shape of the face, the skin tone, the nose, the mouth, the eyebrows, the hair, the moles and today's age; from the child, keep the face in the old photo, with the age, the hair, the bangs, the teeth (including the missing one) and the clothes of that time. The child is not the adult shrunk down: she has a real child's face, and the only thing linking the two is what the old photo already shows. Do not make the adult look younger or smooth her skin, do not age the child, do not copy the hairstyle from one to the other. With no photos uploaded, create a 100% fictional person with no resemblance to anyone real",
"subject": "on the viewer's right, a woman of about 32, light brown skin, dark brown curly hair, voluminous and shoulder-length, thick eyebrows, a small dark mole just above the corner of her mouth, on the viewer's right side; eyes closed, head tilted, a restrained closed-mouth smile. On the viewer's left, the same person at 6: light brown skin, shorter dark brown curly hair, with straight bangs cut at eyebrow level, the SAME mole, in the SAME spot on the face as hers: just above the corner of the mouth, on the viewer's right side, at the level of the upper lip, and not on the cheek, full cheeks, proportionally large brown eyes, laughing at the camera with her mouth open and a front tooth missing",
"wardrobe": "the woman, a plain white cotton-knit T-shirt with short sleeves and dark jeans; the girl, a mustard-yellow knit dress with puffed sleeves and a round white collar with a plain ruffle, 90s family-photo clothes; no lettered print, no brand",
"action": "the two are sitting on the floor, the girl in front and slightly to the left, leaning against the woman's lap and chest; the woman hugs the girl from behind, with both arms crossed in front of the girl's chest, and rests her cheek on the top of the girl's head; the girl holds with both hands the woman's forearm that crosses in front of her",
"scene": "in front of a light, plain white fabric curtain with soft vertical folds that fills the entire background; no furniture, picture or object in sight",
"composition": "vertical photo in a 3:4 ratio, framed from the thighs up, both heads in the upper half of the frame. The woman's face takes up about 28% of the frame width, with the top of the hair at ~10% of the height and the eye line at ~31%; the girl's face takes up about 21% of the width, with the top of the hair at ~32% of the height and the eye line at ~43%. The girl's head sits lower and to the left, tucked under the woman's chin",
"camera": "handheld instant camera, about 1.5 metres away, at the girl's eye level and without tilt; fixed normal-angle lens, focus on both faces, background sharp enough to show the folds of the curtain",
"lighting": "direct, frontal built-in flash in a dimly lit room: it lights the faces evenly, leaves a slight shine on the foreheads and noses of both, and casts on the curtain, behind and to the left of them, a short dark shadow with a crisp edge; the corners of the frame are darker than the centre",
"color_palette": "cream and beige of the curtain, mustard yellow of the dress, white of the T-shirt and the collar, dark blue of the jeans, dark brown of the hair, warm light brown skin; slightly faded, warm instant-film colours",
"style": "photorealistic, a real instant-film photo, spontaneous and tender, as if someone had photographed the two of them at a reunion; nothing like a studio portrait, a social media filter or a photo montage",
"materials": "instant-film grain visible across the whole frame, cotton knit of the dress and the T-shirt, curls with loose strands, light and opaque fabric of the curtain, natural skin texture on both",
"details": "What this image exists to deliver is TWO ages of the same person inside the SAME photo. Three things prove it. First: the child has a child's face, and not the adult's face shrunk down; the only thing linking the two is what the old photo already shows (here, the mole above the mouth, on the same side, and the curly hair), and the missing tooth is still missing. Second: both get the same flash light, the same grain, the same colour and the same shadow on the curtain; if one comes out sharper, more yellow or with different light, it has become a collage. Third: the hug is real, the woman's arms sink slightly into the dress and the girl's hands squeeze her forearm",
"negative_prompt": "child with an adult's face, child identical to the adult, both with the same hairstyle, missing tooth filled in, mole in a different spot on the face, aged child, rejuvenated adult, smoothed skin, plastic skin, filter face, different sharpness between the two, different grain between the two, different colour between the two, light coming from different sides, collage look, cutout with a hard edge, extra person, white instant-photo frame, border, photo within a photo, black and white, date stamp in the corner, caption, text, letters, numbers, watermark, logos or real brands, resemblance to a known real person, deformed hands, extra fingers, AI artifacts"
}
How to use
The polaroid trend of hugging your younger self puts two ages of you in the same photo, as if you had met again. What ruins the trend is the AI getting it "too right": it gives the child your current face shrunk down, or lights each of you differently and the photo turns into a collage. This prompt locks down both, with an instant-camera flash in front of a white curtain. Works in ChatGPT, Gemini and NanoBanana.
1. Upload two photos together: one of you today, facing the camera, and one from childhood with your face clearly visible.
2. Say which is which and how old you were in the old photo.
3. Describe yourself in `subject` and swap the clothes in `wardrobe`; the rest of the JSON stays the same.
4. If the child looks too much like you today, try again quoting `identity`.
5. If one of the two comes out sharper or in a different colour, ask again: that is a collage.
Tip: print it on small photo paper and give it to your mom.
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