{
 "id": "vehicle.military-land.tank/is3-heavy-tank",
 "version": 3,
 "name": "IS-3-style heavy tank",
 "summary": "IS-3 retrofit: original silhouette, materials and legacy pivots retained; 44 detachable parts, articulated hatches, recoil barrel and tank-damage/v1 pair.",
 "tags": [
  "3",
  "era-ww2",
  "heavy",
  "is",
  "is3",
  "land",
  "military",
  "style",
  "tank",
  "ussr",
  "vehicle"
 ],
 "style": "realistic",
 "status": "approved",
 "frame": {
  "contract": "library/tracked-+Z-front-+X-left-origin-ground-centre",
  "up": "+Y",
  "unit": "m",
  "front": "+Z"
 },
 "size": {
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   "l": 9.85,
   "h": 2.45
  },
  "source": "measured",
  "class_band": "vehicle.military-land.tank",
  "band_axis": "length",
  "band": [
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   11
  ],
  "in_band": true,
  "scale_to_class": 1.0
 },
 "bounds": {
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    0.0,
    -3.363
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    2.45,
    6.487
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  "footprint": {
   "kind": "rect",
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   "maxX": 1.575,
   "minZ": -3.363,
   "maxZ": 6.487,
   "source": "measured"
  },
  "collider": {
   "parts": [
    {
     "type": "box",
     "x": 0.0,
     "y": 1.225,
     "z": 1.562,
     "hx": 1.575,
     "hy": 1.225,
     "hz": 4.925
    }
   ],
   "source": "guessed"
  }
 },
 "placement": {
  "role": null,
  "notes": null,
  "source": null
 },
 "sockets": [
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   "name": "wheel_l1",
   "role": "wheel",
   "parent": "Wheel_L1",
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    0.758,
    2.774
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   "rot": [
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    0,
    0,
    1
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   "radius": 0.758,
   "steer": false,
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  },
  {
   "name": "wheel_l2",
   "role": "wheel",
   "parent": "Wheel_L2",
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   "rot": [
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    0,
    0,
    1
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   "steer": false,
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  },
  {
   "name": "wheel_l3",
   "role": "wheel",
   "parent": "Wheel_L3",
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   "rot": [
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    0,
    1
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   "steer": false,
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  },
  {
   "name": "wheel_l4",
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   "steer": false,
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  },
  {
   "name": "wheel_l5",
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   "steer": false,
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  },
  {
   "name": "wheel_l6",
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    1
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   "steer": false,
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  },
  {
   "name": "exhaust",
   "role": "exhaust",
   "parent": null,
   "pos": [
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    1.212,
    -3.343
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   "rot": null,
   "source": "authored"
  },
  {
   "name": "fx_ammo",
   "role": "fx",
   "parent": null,
   "pos": [
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    0.878,
    -0.2
   ],
   "rot": null,
   "source": "authored"
  },
  {
   "name": "fx_engine",
   "role": "fx",
   "parent": null,
   "pos": [
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    1.499,
    -2.146
   ],
   "rot": null,
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  },
  {
   "name": "light_head_l",
   "role": "light",
   "parent": null,
   "pos": [
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    1.453,
    2.5
   ],
   "rot": null,
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  },
  {
   "name": "light_head_r",
   "role": "light",
   "parent": null,
   "pos": [
    -0.968,
    1.453,
    2.5
   ],
   "rot": null,
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  },
  {
   "name": "seat_driver",
   "role": "seat",
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   "pos": [
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  },
  {
   "name": "fx_hatch",
   "role": "fx",
   "parent": null,
   "pos": [
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    2.441,
    0.1
   ],
   "rot": null,
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  },
  {
   "name": "muzzle",
   "role": "muzzle",
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   "pos": [
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   ],
   "rot": null,
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  },
  {
   "name": "seat_commander",
   "role": "seat",
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    2.431,
    0.1
   ],
   "rot": null,
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  }
 ],
 "nodes": {
  "body": [
   "Hull"
  ],
  "wheels": [
   "Wheel_L1",
   "Wheel_L2",
   "Wheel_L3",
   "Wheel_L4",
   "Wheel_L5",
   "Wheel_L6",
   "Wheel_L7",
   "Wheel_L8",
   "Wheel_L9",
   "Wheel_L10",
   "Wheel_L11",
   "Wheel_R1",
   "Wheel_R2",
   "Wheel_R3",
   "Wheel_R4",
   "Wheel_R5",
   "Wheel_R6",
   "Wheel_R7",
   "Wheel_R8",
   "Wheel_R9",
   "Wheel_R10",
   "Wheel_R11"
  ],
  "steer": [],
  "turret": [
   "Turret"
  ],
  "guns": [
   "Gun",
   "MG"
  ],
  "barrels": [
   "Barrel"
  ],
  "tracks": [
   "Track_L",
   "Track_R"
  ],
  "doors": [
   "Hatch_Commander",
   "Hatch_Driver",
   "Hatch_Loader"
  ],
  "damage": {
   "contract": "tank-damage/v1",
   "states": [
    "healthy",
    "stripped",
    "hit",
    "immobilised",
    "gun-out",
    "wreck"
   ],
   "parts": [
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     "node": "Part_EngineGrille_L",
     "twin": "Dmg_EngineGrille_L",
     "zone": "top",
     "pos": [
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      -2.166
     ]
    },
    {
     "node": "Part_EngineGrille_R",
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     "pos": [
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      1.485,
      -2.166
     ]
    },
    {
     "node": "Part_ExhaustGuard_L",
     "twin": null,
     "zone": "rear",
     "pos": [
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      1.279,
      -3.114
     ]
    },
    {
     "node": "Part_ExhaustGuard_R",
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     "zone": "rear",
     "pos": [
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      1.279,
      -3.114
     ]
    },
    {
     "node": "Part_Fender_FL",
     "twin": "Dmg_Fender_FL",
     "zone": "left",
     "pos": [
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      2.809
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    },
    {
     "node": "Part_Fender_FR",
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     "pos": [
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    },
    {
     "node": "Part_Fender_L1",
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     "zone": "left",
     "pos": [
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      0.998
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    },
    {
     "node": "Part_Fender_L2",
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     "zone": "left",
     "pos": [
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    {
     "node": "Part_Fender_R1",
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     "pos": [
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      0.998
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    },
    {
     "node": "Part_Fender_R2",
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     "pos": [
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    },
    {
     "node": "Part_Fender_RL",
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     "zone": "left",
     "pos": [
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      1.234,
      -2.993
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    },
    {
     "node": "Part_Fender_RR",
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     "zone": "right",
     "pos": [
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      1.234,
      -2.993
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    },
    {
     "node": "Part_FuelTank_L1",
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     "pos": [
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      -1.327
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    },
    {
     "node": "Part_FuelTank_L2",
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     "pos": [
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    {
     "node": "Part_FuelTank_R1",
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     "pos": [
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    {
     "node": "Part_FuelTank_R2",
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     "pos": [
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      1.713,
      -2.415
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    },
    {
     "node": "Part_Headlight_L",
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     "zone": "left",
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      1.449,
      2.425
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    },
    {
     "node": "Part_Headlight_R",
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    },
    {
     "node": "Part_LampGuard_L",
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     "pos": [
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      2.425
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    },
    {
     "node": "Part_LampGuard_R",
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    },
    {
     "node": "Part_SpareTrack_L1",
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      2.617
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    },
    {
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    },
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     "node": "Part_SpareTrack_R3",
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    },
    {
     "node": "Part_Stowage_L1",
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     "pos": [
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      -0.2
     ]
    },
    {
     "node": "Part_Stowage_L2",
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     "pos": [
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    },
    {
     "node": "Part_Stowage_R1",
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     "pos": [
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    },
    {
     "node": "Part_Stowage_R2",
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     "zone": "right",
     "pos": [
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      -1.118
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    },
    {
     "node": "Part_TowCable_L",
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     "zone": "left",
     "pos": [
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      -1.372
     ]
    },
    {
     "node": "Part_TowCable_R",
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     "zone": "right",
     "pos": [
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     ]
    },
    {
     "node": "Part_Turret_Antenna",
     "twin": null,
     "zone": "turret",
     "pos": [
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      2.241,
      -0.369
     ]
    },
    {
     "node": "Part_Turret_CupolaRing",
     "twin": "Dmg_Turret_CupolaRing",
     "zone": "turret",
     "pos": [
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      2.314,
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     ]
    },
    {
     "node": "Part_Turret_DShKMount",
     "twin": null,
     "zone": "turret",
     "pos": [
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      2.286,
      -0.12
     ]
    },
    {
     "node": "Part_Turret_GrabRail_L1",
     "twin": "Dmg_Turret_GrabRail_L1",
     "zone": "turret",
     "pos": [
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     ]
    },
    {
     "node": "Part_Turret_GrabRail_L2",
     "twin": "Dmg_Turret_GrabRail_L2",
     "zone": "turret",
     "pos": [
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     ]
    },
    {
     "node": "Part_Turret_GrabRail_L3",
     "twin": "Dmg_Turret_GrabRail_L3",
     "zone": "turret",
     "pos": [
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    },
    {
     "node": "Part_Turret_GrabRail_R1",
     "twin": "Dmg_Turret_GrabRail_R1",
     "zone": "turret",
     "pos": [
      -1.024,
      2.028,
      0.949
     ]
    },
    {
     "node": "Part_Turret_GrabRail_R2",
     "twin": "Dmg_Turret_GrabRail_R2",
     "zone": "turret",
     "pos": [
      -1.146,
      2.028,
      0.2
     ]
    },
    {
     "node": "Part_Turret_GrabRail_R3",
     "twin": "Dmg_Turret_GrabRail_R3",
     "zone": "turret",
     "pos": [
      -0.851,
      2.028,
      -0.548
     ]
    },
    {
     "node": "Part_Turret_Sight_L",
     "twin": "Dmg_Turret_Sight_L",
     "zone": "turret",
     "pos": [
      0.395,
      2.282,
      0.673
     ]
    },
    {
     "node": "Part_Turret_Sight_R",
     "twin": "Dmg_Turret_Sight_R",
     "zone": "turret",
     "pos": [
      -0.721,
      2.282,
      0.503
     ]
    },
    {
     "node": "Part_UnditchingBeam",
     "twin": null,
     "zone": "rear",
     "pos": [
      0.0,
      0.578,
      -3.184
     ]
    }
   ],
   "scars": {
    "hull-front": "Scar_Hull_Front",
    "hull-l": "Scar_Hull_L",
    "hull-r": "Scar_Hull_R",
    "hull-rear": "Scar_Hull_Rear",
    "turret-front": "Scar_Turret_Front",
    "turret-l": "Scar_Turret_L",
    "turret-r": "Scar_Turret_R",
    "turret-rear": "Scar_Turret_Rear"
   },
   "broken": {
    "Track_L": "Track_L_Broken",
    "Track_R": "Track_R_Broken",
    "Gun": "Gun_Broken"
   },
   "wreck": {
    "hull": "Wreck_Hull",
    "turret": "Wreck_Turret"
   },
   "attach": {
    "Hull_Damage": "Hull",
    "Turret_Damage": "Turret"
   },
   "file": {
    "key": "damage_glb",
    "tris": 83331,
    "bytes": 833636,
    "gpu_mb_decoded": 2.2
   },
   "fx": {
    "ammo": [
     0.0,
     0.878,
     -0.2
    ],
    "engine": [
     0.0,
     1.499,
     -2.146
    ],
    "hatch": [
     -0.425,
     2.441,
     0.1
    ]
   },
   "how": "load files.damage_glb once, add it at the tank origin, hide all of it; put Turret_Damage under the node in attach (same pivot); hit = show a Scar_ and swap a Part_ for its twin; stripped = hide Part_ nodes (or throw them); broken = swap the node for its _Broken twin; wreck = hide the whole healthy file, show Wreck_Hull (+ Wreck_Turret, which may be thrown off). Paint in both files takes the same colour."
  },
  "axes": {
   "Gun": {
    "yaw": [
     0,
     1,
     0
    ],
    "pitch": [
     -1,
     0,
     0
    ]
   },
   "MG": {
    "yaw": [
     0,
     1,
     0
    ],
    "pitch": [
     -1,
     0,
     0
    ]
   },
   "Turret": [
    0,
    1,
    0
   ],
   "Barrel": [
    0,
    0,
    -1
   ]
  },
  "limits": {
   "Gun": {
    "yaw": [
     0,
     0
    ],
    "pitch": [
     -0.12,
     0.35
    ]
   },
   "MG": {
    "yaw": [
     -1.0,
     1.0
    ],
    "pitch": [
     -0.15,
     0.6
    ]
   },
   "Barrel": [
    0,
    0.35
   ]
  }
 },
 "paint": {
  "encoding": "material factor",
  "material": "Paint",
  "default": [
   0.13,
   0.15,
   0.08
  ],
  "paints": [
   [
    0.13,
    0.15,
    0.08
   ],
   [
    0.075,
    0.115,
    0.065
   ],
   [
    0.48,
    0.36,
    0.2
   ],
   [
    0.18,
    0.205,
    0.18
   ],
   [
    0.72,
    0.74,
    0.69
   ],
   [
    0.035,
    0.049,
    0.031
   ]
  ],
  "names": [
   "Olive drab",
   "NATO green",
   "Desert tan",
   "Field grey",
   "Winter white",
   "Dark green-black"
  ],
  "colour_space": "linear",
  "how": "set the Paint material's color (linear RGB) to recolour; nothing else uses Paint"
 },
 "render": {
  "tris": 130295,
  "verts": 195233,
  "materials": 8,
  "draw_calls": 183,
  "textures": [
   {
    "px": [
     512,
     512
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     512,
     512
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     1024,
     1024
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     512,
     512
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     512,
     512
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     1024,
     1024
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     128,
     128
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     128,
     128
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     512,
     512
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     512,
     512
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     1024,
     1024
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     128,
     128
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     128,
     128
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     128,
     128
    ],
    "fmt": "ktx2"
   },
   {
    "px": [
     256,
     256
    ],
    "fmt": "ktx2"
   }
  ],
  "gpu_mb_decoded": 7.3,
  "bytes": 1461572,
  "codec": "draco",
  "extensions": [
   "KHR_draco_mesh_compression",
   "KHR_texture_basisu",
   "KHR_texture_transform"
  ]
 },
 "rig": null,
 "animations": [],
 "gameplay": {
  "source": "measured"
 },
 "techniques": [
  "baked-pbr",
  "draco",
  "paint-factor",
  "textured"
 ],
 "provenance": {
  "author": "gpt-6-astra (Blender)",
  "source": "jobs/is3-heavy-tank-v2",
  "kit": "library-author",
  "job": "is3-heavy-tank-v2",
  "feedback": "RETROFIT, not a new model. This tank is already in the library (previous.glb, previous_final.png, previous_side.png, build_is3-heavy-tank.py, previous_nodes.json; its baked textures are on gex44 in /root/fal-author/is3-heavy-tank-v1/textures: copy what you reuse into your own remote dir, never write in the old one). Games now need it DESTRUCTIBLE like the newer library tanks. Keep the model exactly: same shape, proportions, frame, origin, materials, texture look, node names, pivots, Paint material and factor, paints in nodes.json. Start from build_is3-heavy-tank.py and change only this: (1) every bolt-on item becomes its own Part_ node with a complete surface underneath (for this type: the four external rear fuel tanks, fender stowage boxes, side fender sections, spare track links, tow cables, unditching log, headlight with guard, exhaust guards; turret: the DShK roof machine gun mount, grab rails, the commander cupola ring, sight housings); (2) the barrel is split from Gun into a child Barrel, the empty Muzzle becomes a child of Barrel at the tip with identity rotation (+Z forward); (3) add the Fx_ empties and the hatches the rig asks for; (4) build FILE B, the damage GLB, from copies of your meshes, with its Burnt and Scars textures; (5) render states.png and look at it. Everything else in the contract below holds.",
  "imported": "2026-10-07",
  "file_origin": "~/forge-build/forge-assets/jobs/is3-heavy-tank-v2/is3-heavy-tank.glb",
  "parent": {
   "id": "vehicle.military-land.tank/is3-heavy-tank",
   "version": 2,
   "release": "sha256:98b671e50f65a1527543e743857f2f47020a9c1e23fb42ba17258282d517591d"
  },
  "variant": {
   "kind": "rerun",
   "note": "RETROFIT, not a new model. This tank is already in the library (previous.glb, previous_final.png, previous_side.png, build_is3-heavy-tank.py, previous_nodes.json; its baked textures are on gex44 in /r"
  }
 },
 "licence": {
  "kind": "owned",
  "game_use": true,
  "raw_redistribute": false,
  "evidence": "Forge Astra Blender job is3-heavy-tank-v2 (Nano Banana Pro sheet, CC0 Poly Haven textures: brown_mud_dry, green_metal_rust, metal_plate, rusty_metal_03)"
 },
 "quality": {
  "gates": "pass: 7 MB of 12 MB texture budget, 130295 tris",
  "judge": null
 },
 "files": {
  "glb": "sha256:84c42d723485f3d454a441c1bdf9e39474e07a9f907e428a8672d122cdfebd40",
  "damage_glb": "sha256:e6f58ed23fee22eef9e31d96564747dd41114ee9bcf09626b54eeee886d56d6a"
 },
 "deps": [],
 "release": "sha256:001454cb3ceabfb6b30e662c2262dda87f48e157eb78bc62a07688c613e4e8db"
}