{
  "master_prompt": {
    "scene_type": "fine-art cinematic monochrome studio portrait",
    "reference_requirement": {
      "identity_match": "precisely match the uploaded reference image",
      "facial_structure_accuracy": [
        "bone structure",
        "eye shape",
        "nose proportions",
        "jawline definition",
        "facial symmetry",
        "hairline"
      ],
      "skin_texture": "authentic natural skin texture with visible pores and fine skin detail",
      "no_artificial_smoothing": true
    },
    "subject": {
      "type": "young confident woman",
      "age": "around 25 years",
      "expression": {
        "mood": "serious, contemplative, quietly confident",
        "gaze": "direct eye contact with the camera",
        "emotion": "focused, introspective, calm and self-assured"
      }
    },
    "hairstyle": {
      "adaptive": true,
      "requirement": "match hairstyle from reference image exactly",
      "details": [
        "same volume",
        "same direction",
        "same hairline",
        "natural hair strand detail",
        "subtle highlights from overhead lighting"
      ]
    },
    "pose": {
      "style": "classic thinker pose",
      "description": [
        "one hand raised to the chin",
        "thumb resting gently along the jawline",
        "index finger slightly curled near the cheek",
        "hand relaxed and natural",
        "knuckles and tendons subtly visible",
        "hand in sharp focus with natural skin texture"
      ]
    },
    "lighting": {
      "style": "low-key fine-art studio lighting",
      "contrast": "high contrast but refined tonal control",
      "key_light": {
        "position": "slightly above eye level",
        "direction": "toward viewer's left angled downward",
        "type": "large softbox or diffused beauty dish",
        "effect": "soft sculpted highlights with crisp facial definition"
      },
      "highlight_focus": [
        "forehead center",
        "nose bridge",
        "upper cheekbones",
        "lip contour",
        "top planes of the hand"
      ],
      "shadow_control": [
        "soft shadow shaping under brow ridge",
        "subtle cheekbone definition",
        "deep but detailed shadow side",
        "midtone detail preserved"
      ],
      "fill_light": {
        "position": "minimal fill from front-center",
        "purpose": "retain facial symmetry while preserving depth"
      },
      "rim_light": {
        "intensity": "very subtle",
        "location": "hair edges and outer shoulder",
        "purpose": "create gentle separation from the black background"
      },
      "catchlights": {
        "type": "small soft rectangular reflection",
        "placement": "centered in both eyes"
      }
    },
    "background": {
      "type": "pure black",
      "texture": "none",
      "light_spill": "fully absorbed"
    },
    "composition": {
      "orientation": "portrait vert"
    }
  }
}