{
"subject": "a collector's scale model of a compact four-door hatchback, roughly 1:24 scale and about 15 cm long: body painted in metallic silver with a clear-coat shine, tinted transparent windows, headlights and tail lights with acrylic lenses, a black front grille made of two horizontal slats, silver mirrors, five twin-spoke alloy wheels with matte rubber tyres and a short roof antenna; the grille carries no carmaker emblem at all. When the reader uploads a photo of their own car, keep the uploaded model faithfully: the silhouette of the body, the number of doors, the shape of the headlights and the grille, the wheel design and the exact colour of the paint, changing only the scale and the surroundings",
"action": "the model simply sits on the table, turned three quarters to the viewer's left; to its right and slightly in front lies a REAL-sized car key with a black plastic body and a metal blade, and it is the key that gives the scale away, because it is almost as long as the rear of the model",
"scene": "a light wooden table fills the whole bottom half of the frame; behind it, a living room blurred into neutral tones, with a bright window on the left, a green potted plant in the middle and a grey sofa on the right; in the right corner, entering the frame and cut off by it, a beige speckled ceramic mug",
"composition": "vertical image in 3:4 ratio; the little car sits in the middle band of the height, slightly left of the axis, with its front pointing left; the key makes a diagonal in the bottom right corner; the top half is blurred background only; the car shows whole, with no wheel or bumper cropped",
"camera": "camera at table height, almost level with the roof of the model and just above it; 50 mm lens at close range, focus on the door and the front headlight, shallow depth of field that dissolves the background and already softens the rear of the model",
"lighting": "natural late afternoon light coming through a window on the left, diffuse and warm; a long, soft reflection along the bonnet and the roof; a short, soft shadow on the right of the car, with no hard edge",
"color_palette": "honey-coloured wood, the cold silver of the car, grey and green in the blurred background, black plastic of the key; a bright image, low in saturation, with the metal of the car as the coldest point in the frame",
"style": "realistic product photography shot at home, with window light instead of studio light, no retouching and no artificial gloss: it looks like a photo a collector took on the living room table",
"materials": "smooth metallic paint under clear coat, transparent acrylic of the headlights, matte rubber of the tyres, fine-grained wood, matte ceramic of the mug",
"details": "keep the scale given away by the real key beside it, the long reflection on the bonnet, the short shadow on the wood and the background readable as a living room with nothing sharp in it",
"negative_prompt": "full-size car, street, garage, road, race track, person, hand, text, letters, numbers, licence plate, real carmaker emblem or logo, children's plastic toy, 3D render look, exaggerated gloss, watermark, AI artifacts"
}
How to use
Car miniatures are one of the fastest growing AI photo requests, and what makes the image work is not the car: it is the scale. This prompt puts your car on a table at collector's model size, with a real car key beside it to prove that it shrank. It works in ChatGPT, Gemini and NanoBanana.
1. Upload a three-quarter photo of the car, taken in daylight with the whole car in frame. A straight front shot flattens the model.
2. In the subject field, swap the description for your own car: the exact paint colour, the number of doors and the wheel design.
3. Do not remove the key from the scene. It is what makes the eye read miniature instead of a car on a giant table.
4. If your plate shows, ask for it to be left blank: small lettering is what every generator gets wrong.
5. Generate twice and keep the one that kept the grille and the headlight like your car's.
Tip: ask for the same scene with the driver's door open. That is the version that gets comments.
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