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{
  "name": "Central control room",
  "description": "Cut-away central control room on a raised access floor. Two operator console rows face a 3 × 5 video wall; a supervisor desk sits behind. DCS cabinets run along one wall, with the fire-alarm panel and a CCTV display on the other. Double A60 doors at the escape route and blast-rated windows. Screens show sample HMI pages; pass live textures through each component's `screens` prop.",
  "source": "Deck Twin example (illustrative layout, not a real asset)",
  "camera": {
    "target": [
      0,
      1.2,
      0
    ],
    "radius": 7,
    "direction": [
      0.3,
      0.85,
      1
    ]
  },
  "items": [
    {
      "tag": "B-300",
      "component": "room",
      "position": [
        0,
        0,
        0
      ],
      "props": {
        "width": 14,
        "depth": 10,
        "height": 3.2,
        "cutaway": true,
        "label": "CENTRAL CONTROL ROOM",
        "tag": "B-300",
        "doors": [
          {
            "wall": "-x",
            "offset": 2.5,
            "kind": "double",
            "hardware": "panic",
            "open": 0.4
          },
          {
            "wall": "+x",
            "offset": -3,
            "kind": "single",
            "open": 0
          }
        ],
        "windows": [
          {
            "wall": "-z",
            "offset": -5.2,
            "width": 1.8,
            "height": 1,
            "sill": 1.1
          },
          {
            "wall": "-z",
            "offset": 5.2,
            "width": 1.8,
            "height": 1,
            "sill": 1.1
          }
        ]
      }
    },
    {
      "tag": "VW-001",
      "component": "video-wall",
      "position": [
        0,
        0.3,
        -4.4
      ],
      "props": {
        "rows": 3,
        "cols": 5,
        "diagonal": 55,
        "tag": "VW-001"
      }
    },
    {
      "tag": "OWS-101",
      "component": "control-console",
      "position": [
        0,
        0.3,
        -0.6
      ],
      "props": {
        "segments": 3,
        "layout": "curved",
        "tag": "OWS-101"
      }
    },
    {
      "tag": "OWS-102",
      "component": "control-console",
      "position": [
        0,
        0.3,
        2.6
      ],
      "props": {
        "segments": 2,
        "layout": "straight",
        "monitorsPerSegment": 2,
        "rows": 1,
        "tag": "OWS-102"
      }
    },
    {
      "tag": "SUP-1",
      "component": "desk",
      "position": [
        4.9,
        0.3,
        3.4
      ],
      "props": {
        "layout": "supervisor",
        "tag": "SUP-1"
      }
    },
    {
      "tag": "SC-101",
      "component": "system-cabinet",
      "position": [
        -6.45,
        0.3,
        -1.6
      ],
      "rotation": 90,
      "props": {
        "count": 4,
        "system": "dcs",
        "door": "glazed",
        "tag": "SC-101"
      }
    },
    {
      "tag": "FACP-01",
      "component": "fire-alarm-panel",
      "position": [
        7,
        0.3,
        0.6
      ],
      "rotation": -90,
      "props": {
        "panel": "fire-alarm",
        "tag": "FACP-01"
      }
    },
    {
      "tag": "ESD-01",
      "component": "fire-alarm-panel",
      "position": [
        7,
        0.3,
        -0.6
      ],
      "rotation": -90,
      "props": {
        "panel": "esd-mimic",
        "tag": "ESD-01"
      }
    },
    {
      "tag": "DSP-101",
      "component": "wall-display",
      "position": [
        7,
        0.3,
        -2.8
      ],
      "rotation": -90,
      "props": {
        "size": 55,
        "content": "cctv",
        "tag": "DSP-101"
      }
    }
  ],
  "lines": []
}

No issues. Every port is connected and nothing overlaps or floats.