Halloween couple portrait from your photo: matched costumes
Prompt for Gemini: turn a photo of two people into a Halloween couple portrait with matched costumes and one shared key light.
The prompt
Use the uploaded photo of two people. Faces: keep the exact facial features of both people from the uploaded photo - bone structure, eye shape, nose, lips, hairline, skin texture, freckles and moles. Do not smooth the skin, do not change the age, do not slim the faces, do not blend or swap the two faces with each other. Keep each person on the same side of the frame as in the original photo. Costume: dress them as a matched pair - [COSTUME PAIR: Victorian ghost bride and groom]. Same era, same fabric weight, one shared accent color: [ACCENT COLOR: deep red]. Scene: [SETTING: a porch at night / a party room], with [AIR EFFECT: thin fog / drifting embers / light rain]. Keep the air effect behind the two people, never across their faces. Light: one warm key light 45 degrees from the left at face height, one cool rim light behind both heads to separate them from the background. Both faces get the same key light. Neither face falls into shadow. 85mm lens look, shallow depth of field, background softly out of focus. Framing: waist-up, both faces fully visible, shoulders overlapping, [FRAME: vertical 4:5 / square 1:1]. Photographic, not illustration. No text, no watermark, no third person in frame.
What you get
You get a waist-up portrait of the same two people, recognizable at a glance. Warm key light from the left lands on both faces at equal strength; a cool rim light traces the edge of both heads and lifts them off a dark, blurred background. The costumes read as one idea, not two: same period, same fabric weight, one accent color repeated in a ribbon, a lining, a glove. Skin keeps its pores and moles. The fog or embers sit behind the subjects, never across the faces.
What breaks, and the fix. First, the second face drifts. Gemini holds the person nearest the camera and quietly redraws the other one younger and thinner. Fix: generate once, then send the result back with "keep the person on the right exactly as in the original photo, change only the costume". Second, the costumes split into two unrelated characters. Fix: name one era and one accent color, and keep the words "matched pair" in the prompt. Third, the light splits: one face warm, the other in shadow. Fix: delete the rim light line and regenerate with the key light alone, then add the rim light back in a second pass. Fourth, the hands merge into one shape where the two people touch. Fix: crop to chest level, or add "hands not visible".
Use it for a paired profile picture, a party invitation, or a printed card. Vertical 4:5 fits stories best.
