{
  "scene_index": 12,
  "shot_index": 4,
  "base_plan_id": "rooftop_room_interior",
  "visual_domain": "interior",
  "camera": {
    "position": "On the living-room side of the small bedroom doorway, almost on the floor at the threshold, just outside the slightly open bedroom door; the door edge and threshold form a narrow foreground slit.",
    "heading": "Aimed through the small bedroom door into the room, centered on the lower-middle floor area, with the dashed cone continuing diagonally toward the rear-right curtain-window zone.",
    "height": "low",
    "fov": "WS",
    "lens_note": "Low-angle observer view; wide shot through a partially open door, emphasizing floor evidence and the diagonal trail path rather than any figure."
  },
  "characters": [],
  "additions": [
    {
      "type": "camera_symbol",
      "position": "Place triangular wedge marker immediately outside the small bedroom door, on the living-kitchen side of the threshold.",
      "note": "Label as CAM-S12-Shot4 (WS, low angle, low lens, through-door frame); wedge points into the small bedroom."
    },
    {
      "type": "fov_cone",
      "position": "Dashed wide cone begins at the threshold camera marker, passes through the narrow door opening, covers the lower-middle bedroom floor, and reaches toward the rear-right curtain zone.",
      "note": "Keep cone wide enough for WS but visually constrained by the door slit."
    },
    {
      "type": "door_state",
      "position": "Small bedroom door between living-kitchen and small bedroom.",
      "note": "Show door slightly open inward away from camera; emphasize door edge as foreground framing line."
    },
    {
      "type": "threshold_marker",
      "position": "At the small bedroom doorway floor line.",
      "note": "Add worn, dirty threshold annotation as low-angle scale reference."
    },
    {
      "type": "dark_fluid_stippled_region",
      "position": "Small bedroom floor, lower-middle to midground area visible through the doorway.",
      "note": "Draw a dense glossy dark fluid stippled region as the primary focal evidence; avoid any figure marker."
    },
    {
      "type": "footwear_trail_marker",
      "position": "Small bedroom floor, dragging diagonally from the dark fluid region toward the rear-right curtain-window zone.",
      "note": "Use smeared repeated footprint symbols and a faint directional trail line leading toward the curtain."
    },
    {
      "type": "fabric_curtain",
      "position": "Rear/right window-side curtain zone inside the small bedroom.",
      "note": "Use the recurring fabric curtain marker, parted in the middle with still fabric folds, dimly visible as the trail destination."
    },
    {
      "type": "lighting_note",
      "position": "Across living-kitchen doorway spill and small bedroom floor.",
      "note": "Annotate dim cool TV spill and weak stand-lamp spill skimming the floor; keep overlay in monochrome technical style with optional grey/muddy texture zones."
    }
  ],
  "t2i_prompt": "Overlay shot-specific camera and evidence markers onto the existing black-and-white top-down floor plan of the compact rooftop-room interior. Use the small bedroom connected to the living-kitchen area. Place a triangular camera wedge on the living-kitchen side of the small bedroom threshold, very low near the floor, pointing through the slightly open bedroom door into the room. Add label: CAM-S12-Shot4 (WS, low angle, low lens, through-door frame). Draw a wide dashed FOV cone constrained by the door slit, crossing the lower-middle bedroom floor and extending diagonally toward the rear-right curtain-window zone. Show the small bedroom door slightly open inward away from the camera, with the door edge and worn threshold emphasized as a foreground framing device. Add a dense glossy dark fluid stippled region on the visible bedroom floor as the primary midground marker. Add a smeared footwear trail marker leading diagonally from that region toward the curtain. Mark the rear/right fabric curtain zone as parted, still, and dimly visible. Do not add any human figure marker in this shot. Maintain strict 2D architectural plan view, white background, technical line drawing, dashed camera cone, clear overlay annotations, and no 3D perspective.",
  "legend_updates": [
    {
      "symbol": "TRIANGULAR WEDGE",
      "meaning": "camera position and lens direction"
    },
    {
      "symbol": "DASHED WIDE CONE",
      "meaning": "wide-shot field of view constrained by doorway"
    },
    {
      "symbol": "DOOR SLIT",
      "meaning": "slightly open small bedroom door used as through-object frame"
    },
    {
      "symbol": "DF-STIPPLE",
      "meaning": "dense dark fluid stippled region"
    },
    {
      "symbol": "FT-SMEAR",
      "meaning": "smeared footwear trail marker"
    },
    {
      "symbol": "PARTED FABRIC LINES",
      "meaning": "parted curtain-window zone"
    }
  ]
}