ภาพพอร์ตเทรตสตูดิโอขาวดำในท่าคนครุ่นคิด

{
  "master_prompt": {
    "scene_type": "fine-art cinematic monochrome studio portrait",
    "reference_requirement": {
      "identity_match": "precisely match the reference photo",
      "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 micro-details",
      "no_artificial_smoothing": true
    },
    "subject": {
      "type": "[young confident woman]",
      "age": "[around 25 years]",
      "expression": {
        "mood": "serious, contemplative, quietly confident",
        "gaze": "direct eye contact with camera",
        "emotion": "focused, introspective, calm and self-assured"
      }
    },
    "hairstyle": {
      "adaptive": true,
      "requirement": "match hairstyle from the reference photo exactly",
      "details": [
        "same volume",
        "same direction",
        "same hairline",
        "natural individual hair strand rendering",
        "subtle directional highlights"
      ]
    },
    "pose": {
      "style": "classic thinker pose",
      "description": [
        "one hand raised to the chin",
        "thumb resting gently along jawline",
        "index finger slightly curled near the cheek",
        "relaxed and natural hand posture",
        "visible tendon and knuckle definition",
        "hand in sharp focus"
      ]
    },
    "lighting": {
      "style": "low-key fine-art studio lighting",
      "contrast": "high contrast chiaroscuro with smooth tonal gradations",
      "key_light": {
        "position": "slightly above eye level",
        "direction": "angled downward from camera left",
        "type": "large softbox diffuser",
        "effect": "sculpted facial highlights"
      },
      "highlight_focus": [
        "forehead center",
        "bridge of nose",
        "upper cheekbones",
        "lip contour",
        "top planes of hand"
      ],
      "shadow_control": [
        "soft shadows beneath brow ridge",
        "deep shadow on fill side preserving subtle midtones"
      ],
      "rim_light": {
        "intensity": "subtle edge light",
        "location": "hair contour and shoulder edge",
        "purpose": "separation from dark backdrop"
      },
      "catchlights": {
        "type": "soft rectangular reflections",
        "placement": "centered in pupils"
      }
    },
    "background": {
      "type": "solid pure black",
      "light_spill": "zero bounce, complete absorption"
    },
    "composition": {
      "framing": "close-up vertical portrait",
      "depth_of_field": "shallow focus on eyes and face"
    }
  }
}