{
  "generation_request": {
    "meta_data": {
      "tool": "NanoBanana Pro",
      "task_type": "text_to_image_photoreal_candid_birthday_night_indoor",
      "version": "v1.1",
      "priority": "high"
    },
    "references": {
      "reference_images": {
        "person_reference": "UPLOAD_PERSON_REFERENCE_IMAGE",
        "style_reference": "UPLOAD_STYLE_REFERENCE_IMAGE (OPTIONAL)"
      },
      "reference_rules": {
        "preserve_identity": true,
        "identity_lock_strength": 0.999,
        "face_similarity_priority": "MAX",
        "strict_face_match": true,
        "no_identity_drift": true,
        "no_beautify_no_face_morph": true,
        "keep_facial_proportions_exact": true,
        "keep_unique_features": true,
        "keep_skin_tone_exact": true,
        "keep_skin_texture_exact": true,
        "keep_eye_shape_exact": true,
        "keep_nose_shape_exact": true,
        "keep_lip_shape_exact": true,
        "keep_brow_shape_exact": true,
        "do_not_copy_any_unprovided_identity": true
      }
    },
    "output_settings": {
      "aspect_ratio": "9:16",
      "orientation": "portrait",
      "resolution": "ultra_high_res",
      "render_style": "photorealistic_candid_lowlight_flash",
      "sharpness": "high_face_priority_natural",
      "film_grain": "subtle",
      "color_grade": "warm_lowlight_contrast"
    },
    "creative_prompt": {
      "scene_summary": {
        "en": "Ultra-photoreal candid night indoor birthday moment with one subject. The subject’s face must match the uploaded reference identity with maximum fidelity: facial structure, proportions, eyes, nose, lips, brows, skin tone, and skin texture preserved without beautification. Scene: dim modern interior with dark wood elements and geometric ceiling beams. Wardrobe: shimmering light blue satin slip dress with thin straps, elegant drape. Action: the subject holds a small round birthday cake at chest height with both hands supporting the platter; multiple candles are lit. The subject is blowing toward the candles (lips pursed, cheeks slightly puffed). A dramatic flame burst erupts from the candle area and expands to the left side of the frame, with glowing sparks and glitter-like particles suspended in the air. Lighting: low ambient interior + candlelight highlights + a subtle on-camera flash pop; realistic shadows; bright flame core; mild halation around highlights; photoreal skin texture. Composition: subject placed on the right third; flame burst occupies the left third; background softly out of focus. No text, no logos, no watermark."
      },
      "composition": {
        "framing": "9:16 vertical, medium-full body (head to below hips), subject right-third, flame burst left-third",
        "camera_angle": "slightly low to eye-level",
        "focus": "face and cake perfectly sharp; flame and particles crisp; background softly blurred"
      },
      "lighting_and_camera": {
        "lighting": "candlelight motivated key + low ambient fill + subtle flash pop, realistic flame bloom and specular highlights",
        "lens": "35mm–50mm look",
        "aperture": "f/2.8",
        "iso": "800",
        "shutter": "1/125",
        "effects": "mild halation on flame highlights, subtle grain, clean detail retention on face"
      },
      "hard_constraints": [
        "one subject only",
        "identity match to the uploaded reference at maximum fidelity (no drift)",
        "no facial beautification or morphing",
        "cake supported by both hands under the platter",
        "blowing action visible (pursed lips)",
        "large flame burst expanding to the left with sparks/particles",
        "dim modern indoor background with ceiling beams",
        "photoreal skin texture (no smoothing)",
        "no text, no logos, no watermark",
        "hands and fingers anatomically correct"
      ]
    },
    "negative_prompt": [
      "identity drift",
      "face swap artifacts",
      "beautify filter",
      "plastic skin",
      "over-smoothed skin",
      "cgi look",
      "3d render",
      "anime",
      "cartoon",
      "extra people",
      "reflections showing other faces",
      "extra hands",
      "extra fingers",
      "missing fingers",
      "deformed hands",
      "melted anatomy",
      "blurred face",
      "double face",
      "wrong eye direction",
      "text",
      "logo",
      "watermark",
      "overexposed blown highlights (except flame core)",
      "smoke covering face"
    ]
  }
}