Portrait Studio Monochrome d'après Référence

{
  "master_prompt": {
    "scene_type": "fine-art cinematic monochrome studio portrait",
    "reference_requirement": {
      "identity_match": "precisely match the subject from the reference photo",
      "facial_structure_accuracy": [
        "bone structure",
        "eye shape",
        "nose proportions",
        "jawline definition",
        "facial symmetry",
        "hairline",
        "beard density if present"
      ],
      "skin_texture": "authentic natural skin texture with visible pores and fine lines",
      "no_artificial_smoothing": true
    },
    "subject": {
      "type": "[mature confident man]",
      "expression": {
        "mood": "serious, contemplative, quietly authoritative",
        "gaze": "deep-set eyes looking directly into the camera",
        "emotion": "focused and introspective"
      }
    },
    "facial_hair": {
      "adaptive": true,
      "rules": [
        "replicate beard exactly from the reference photo if present",
        "match density, length, shape, and natural edges",
        "preserve natural tonal variation and gray strands",
        "clean and defined contours"
      ],
      "clean_shaven_rule": "if clean-shaven, emphasize sharp jawline definition and natural skin texture"
    },
    "hairstyle": {
      "adaptive": true,
      "requirement": "match hairstyle from the reference photo exactly",
      "details": [
        "identical volume and parting direction",
        "natural strand texture",
        "subtle specular highlights from overhead key light"
      ]
    },
    "pose": {
      "style": "[classic thinker pose]",
      "description": [
        "one hand raised toward chin",
        "thumb along the jawline",
        "index finger lightly curled",
        "defined knuckles and tendons",
        "hand in sharp focus"
      ]
    },
    "lighting": {
      "style": "low-key fine-art studio lighting",
      "contrast": "high contrast with preserved midtone detail",
      "key_light": {
        "position": "slightly above eye level, angled downward from subject's left",
        "type": "diffused softbox",
        "effect": "crisp facial plane definition and subtle edge highlights"
      },
      "shadow_control": "deep, sculpted shadows under cheekbone and jaw with preserved texture",
      "rim_light": "subtle edge separation along hair and shoulder against pure black background"
    }
  }
}