Portrait Studio en Clair-Obscur avec Remplacement de Visage

{
  "meta": {
    "image_dna": {
      "type": "Photo",
      "orientation_lock": "9:16",
      "sensor_emulation": "Sony Alpha, 35mm film grain emulation"
    }
  },
  "spatial_orientation_engine": {
    "subject_facing_direction": "Head turned to left and tilted up",
    "body_rotation": "Torso angled slightly to right, left shoulder forward",
    "camera_position_relative": "Eye-level relative to torso, slightly below eye-level relative to face tilt"
  },
  "camera_optics_and_geometry": {
    "lens_profile": {
      "focal_length": "85mm portrait telephoto",
      "aperture": "f/2.8 shallow depth of field, focus sharp on eyes and lips",
      "lens_character": "Cinematic softness with high micro-contrast"
    },
    "optical_flaws": [
      "Film grain ISO 800",
      "Soft focus falloff on shoulder",
      "Subtle bloom on highlights"
    ]
  },
  "environment_and_physics": {
    "lighting_engine": {
      "primary_source": "Hard spotlight or slit light from top-left (10 o'clock high)",
      "radiosity_color_bleed": "Warm skin tones reflecting onto inner collar of garment",
      "shadow_structure": "Chiaroscuro with deep crushed blacks on the right side of the face and background",
      "volumetrics": "Clean studio air, minimal atmospheric haze"
    },
    "surface_physics": {
      "weather_impact": "None, studio environment",
      "material_response": "Specular reflectivity on skin highlighting shoulder, nose, and cheekbones"
    }
  },
  "objects_and_actors": [
    {
      "id": "MAIN_SUBJECT",
      "role": "Identity preservation from reference photo",
      "pose_engineering": {
        "skeletal_rig": "Cervical spine extended and rotated left, left shoulder elevated, chin lifted",
        "gaze_vector": "Eyes looking up and to the left toward the light source",
        "interaction_physics": "Garment draped loosely, slipping off shoulders"
      },
      "physiological_state": {
        "body_temp_visuals": "Radiant warmth with a subtle flush on cheeks",
        "skin_light_interaction": "Sharp specular highlights on shoulder and nose bridge, subtle subsurface scattering on illuminated skin contours"
      },
      "clothing_simulation": {
        "garment_stack": "[Camel brown terry cloth robe]",
        "fabric_mechanics": "Heavy fabric weight, slipping off shoulders to reveal collarbone",
        "texture_and_wear": "High-friction terry loop texture, tactile uneven surface"
      },
      "identity_placeholders": {
        "skin_tone": "Match reference photo",
        "face_structure": "Match reference photo",
        "hair_style": "Match reference photo"
      }
    }
  ],
  "off_screen_context": {
    "reflections": "Catchlights in upper iris from directional spotlight",
    "implied_environment": "Dark minimalist photo studio"
  }
}