復古晚間閃光人像改造

An extensive JSON prompt for Gemini Nano Banana, designed for image-to-image transformation. It applies a warm-toned, film-like vintage aesthetic with harsh flash lighting and realistic grain to an input photo, while strictly preserving the subject's facial identity and skin texture (no smoothing or AI alterations).

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{ "meta":{ "quality":"High-Definition", "type":"Evening indoor flash portrait", "ratio":"4:5 vertical", "device":"iPhone 16 Pro", "style_reference":"Transform the INPUT PHOTO into this exact aesthetic.", "look":"Evening flash, warm-toned vintage, real grain, realistic skin texture (NO smoothing)." }, "identity_lock":{ "preserve_face": true, "strict": true, "rules":[ "The face MUST remain IDENTICAL to the input photo.", "No changes to facial structure, proportions, expression, or identity.", "No smoothing, no beautify, no retouch, no AI facial alterations." ] }, "skin_texture_rules":{ "keep_texture": true, "no_smoothing": true, "no_blur": true, "realistic_details": "natural texture preserved.", "flash_behavior":"Flash highlights should reveal texture, not hide it." }, "vintage_effect":{ "warmth":"{argument name="warmth" default="+18"}", "contrast":"{argument name="contrast" default="+22"}", "highlights":"{argument name="highlights" default="-5"}", "shadows":"{argument name="shadows" default="+12"}", "grain":"{argument name="grain" default="Medium (film-like)"}", "vignette":"{argument name="vignette" default="Soft"}", "color_grade":"{argument name="color grade" default="Warm beige

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