{
    "id": "crawler-bulldozer-b851fb",
    "title": "Crawler Bulldozer",
    "class": "vehicle",
    "triangles": 3586,
    "kit": "construction-site-9e40b0",
    "free": true,
    "plan": "free",
    "price_usd": 0,
    "price_note": "free: every low poly model is. The /cdn links need no account and no key (an account adds the ready-to-serve zip). The HD edition, where `hd` is not null, comes with Pro",
    "owned": true,
    "page": "https://polyfork.dev/asset/crawler-bulldozer-b851fb",
    "thumbnail": "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/hero.png",
    "preview_glb": "https://polyfork.dev/cdn/crawler-bulldozer-b851fb-preview.glb",
    "hd": null,
    "preview_triangles": 3586,
    "preview_fidelity": 1,
    "preview_rigged": true,
    "preview_rig": "pivots",
    "preview_pivots": [
        "sprocket-l",
        "idler-l",
        "sprocket-r",
        "idler-r",
        "turntable",
        "blade-lift",
        "blade-pitch",
        "blade-tilt",
        "ripper"
    ],
    "preview_note": "This preview keeps its pivots named (preview_pivots), so they turn as rigged_parts describes; its normals are stripped for flat shading. This model is free, so build with `download.glb`: the authored file, normals and node names as built.",
    "has_rig": true,
    "remixable": true,
    "has_night": true,
    "has_decals": true,
    "has_ik": true,
    "ik_type": "arm",
    "has_skeleton": false,
    "size_m": {
        "x": 3.5,
        "y": 3.18,
        "z": 6.45
    },
    "origin_y": 0,
    "mass_kg": 80000,
    "download": {
        "glb": "https://polyfork.dev/cdn/crawler-bulldozer-b851fb.glb",
        "mjs": "https://polyfork.dev/cdn/crawler-bulldozer-b851fb.mjs",
        "auth": "none"
    },
    "export_formats": {
        "fbx": {
            "url": "https://polyfork.dev/dl/crawler-bulldozer-b851fb.fbx",
            "for": "Unity, Unreal, Maya, 3ds Max",
            "available": true
        },
        "usdz": {
            "url": "https://polyfork.dev/dl/crawler-bulldozer-b851fb.usdz",
            "for": "iOS AR Quick Look, Omniverse; with UsdPhysics collision and mass",
            "available": true
        },
        "usda": {
            "url": "https://polyfork.dev/dl/crawler-bulldozer-b851fb.usda",
            "for": "Isaac Sim, Omniverse, Blender, usdview; with UsdPhysics collision and mass",
            "available": true
        },
        "obj": {
            "url": "https://polyfork.dev/dl/crawler-bulldozer-b851fb.obj",
            "for": "universal, geometry only, no pivots",
            "available": true,
            "also_fetch": "https://polyfork.dev/dl/crawler-bulldozer-b851fb.mtl",
            "also_fetch_note": "save it beside the .obj as crawler-bulldozer-b851fb.mtl: the model names that exact file and imports white without it"
        }
    },
    "export_note": "vertex colours become NAMED MATERIALS on export, named after this asset's own colour knobs; a plain format conversion would arrive white, because only three.js reads our COLOR_0. Built on first request (about a second), cached after. This model is free: these download with no account and no key (only its .mjs source asks for a free account).",
    "night": {
        "lamp": {
            "color": "#f2f7ff",
            "intensity": 1,
            "albedo": "#f2f7ff",
            "findable": true,
            "describe": "the two headlamps either side of the radiator grille and the two pairs of work lamps under the cab roof's front and rear lips, burning hard cold work-white"
        },
        "beacon": {
            "color": "#ffc24a",
            "intensity": 0.6,
            "albedo": "#ef6a1e",
            "findable": true,
            "describe": "the faceted beacon drum on the cab roof centre line and the two rear lamp lenses on the back of the rear body, glowing the kit's one warning amber"
        }
    },
    "night_note": "each zone is found by its ALBEDO in COLOR_0: match those vertices exactly, make them emissive at the zone colour and intensity, and drop your scene lights. That is the whole night look.",
    "decals": [
        {
            "name": "tank-left",
            "size": [
                0.44,
                0.3
            ],
            "at": [
                0.63,
                1.62,
                -1.24
            ],
            "normal": [
                1,
                0,
                0
            ],
            "up": [
                0,
                1,
                0
            ],
            "describe": "the flat outer skin of the LEFT (+X) rear body, the tank flank between the fender deck and the top rail",
            "albedo": "#e3a31b",
            "mode": "plate",
            "relief_mm": 0
        },
        {
            "name": "tank-right",
            "size": [
                0.44,
                0.3
            ],
            "at": [
                -0.63,
                1.62,
                -1.24
            ],
            "normal": [
                -1,
                0,
                0
            ],
            "up": [
                0,
                1,
                0
            ],
            "describe": "the flat outer skin of the RIGHT (-X) rear body, the mirror of tank-left",
            "albedo": "#e3a31b",
            "mode": "plate",
            "relief_mm": 0
        }
    ],
    "decals_note": "flat areas you can print your own logo, sign, number or stencil on. `at` is the centre in model space (metres), `normal` points out of the surface, `up` is which way is up in the artwork, `size` is [width, height]. In three.js: bake art with https://polyfork.dev/cdn/sdf.mjs and place it with https://polyfork.dev/cdn/decal.mjs. In any other engine, a `plate` area takes a quad at `at` + `normal` * 0.002; a `projected` area is on a curved face `relief_mm` deep and the mark has to be projected onto the geometry. `albedo` is the colour of the surface underneath, so you can pick art that contrasts. Measured on the DEFAULT build: a geometry knob (a remix, a get_variant result) can move the surface by a few centimetres, and decal.mjs follows it because it raycasts the model you hand it; anywhere else, re-measure or keep the defaults.",
    "params_url": "https://polyfork.dev/cdn/crawler-bulldozer-b851fb-params.json",
    "real_scale": {
        "at_real_size": true,
        "real_m": [
            5,
            6.5
        ],
        "real_dimension": "length",
        "as_built_m": 6.45,
        "scale_to_real": 1,
        "note": "built at real size: its largest dimension, 6.45 m, is inside the typical real 5-6.5 m (an estimate)."
    },
    "physics": {
        "mass_kg": 80000,
        "mass_source": "estimated",
        "material": "steel",
        "body": "dynamic",
        "dimensions_m": {
            "x": 3.5,
            "y": 3.18,
            "z": 6.451
        },
        "up_axis": "Y",
        "meters_per_unit": 1,
        "volume_m3": 16.664517,
        "collision": {
            "approximation": "convexDecomposition",
            "parts": 32,
            "colliders_url": "https://polyfork.dev/cdn/crawler-bulldozer-b851fb-colliders.json"
        },
        "note": "For the default knob settings; a size knob changes all of it. dimensions_m and the colliders are measured from the model; mass_kg and material are an estimate of what the real object weighs. body \"static\" means fixed in place (give it a collider, no rigid body); \"dynamic\" means it moves. collision.approximation uses UsdPhysics terms: \"convexHull\" = one hull is a good fit, \"convexDecomposition\" = use the per-part hulls in colliders_url (the one hull would fill a gap, like the space under a table). Model space, metres, Y up, origin as the model ships."
    },
    "simready_metadata": {
        "simready_metadata_mass": 80000,
        "simready_metadata_rigid_body_count": 1,
        "usd_dimensions": [
            3.5,
            6.451,
            3.18
        ],
        "usd_up_axis": "Z",
        "usd_meters_per_unit": 1,
        "simready_metadata_validation__profile": null
    },
    "materials": 1,
    "draw_calls": 10,
    "description": "A crawler bulldozer, 3.5 m wide over a 3.4 m semi-U blade, 3.0 m to the cab roof, on plate-track crawlers with visible grousers, plant yellow over a dark grey undercarriage.",
    "palette": [
        {
            "hex": "#e3a31b",
            "share": 0.497
        },
        {
            "hex": "#3a4146",
            "share": 0.171
        },
        {
            "hex": "#262b2f",
            "share": 0.161
        },
        {
            "hex": "#9ba5ab",
            "share": 0.132
        },
        {
            "hex": "#f2f7ff",
            "share": 0.02
        },
        {
            "hex": "#ef6a1e",
            "share": 0.016
        }
    ],
    "style": "low-poly, flat-shaded vertex colors, no textures, single shared material, so any set of these merges to one draw call; shares palette and scale with its kit",
    "origin": "ground level (minY = 0): the model sits on y=0 as-is",
    "rigged_parts": {
        "turntable": {
            "axis": "y",
            "range": [
                0,
                10
            ]
        },
        "blade-lift": {
            "axis": "x",
            "range": [
                0,
                -30
            ]
        },
        "blade-pitch": {
            "axis": "x",
            "range": [
                0,
                -8
            ]
        },
        "blade-tilt": {
            "axis": "z",
            "range": [
                0,
                5
            ]
        },
        "ripper": {
            "axis": "x",
            "range": [
                0,
                -14
            ]
        },
        "sprocket-l": {
            "axis": "x",
            "range": [
                0,
                144
            ]
        },
        "sprocket-r": {
            "axis": "x",
            "range": [
                0,
                144
            ]
        },
        "idler-l": {
            "axis": "x",
            "range": [
                0,
                144
            ]
        },
        "idler-r": {
            "axis": "x",
            "range": [
                0,
                144
            ]
        }
    },
    "detachable_parts": [
        "blade-chain"
    ],
    "animation": "rigged parts are named groups with the pivot at the hinge/axle: obj.getObjectByName(part) then rotation[axis] (rotate, degrees) or position[axis] (slide, meters). 0 is the pose the model is built in, which is not always shut: `range` is all the travel the part has from there, and outside it the part passes through the body. Whether the range opens or closes is in that knob's describe in params_url",
    "detaching": "detachable parts are named groups you may hide or remove: obj.getObjectByName(part).visible = false, or .removeFromParent(). The surface behind each is closed, so nothing shows a hole",
    "arm": {
        "slew": "turntable",
        "joints": [
            "blade-lift",
            "blade-pitch"
        ],
        "upper": 0.975,
        "lower": 0.894,
        "tip": [
            0,
            -0.804,
            0.392
        ],
        "tip_rest": [
            0,
            0.106,
            2.954
        ],
        "base": [
            0,
            0.66,
            1.62
        ],
        "reach": 1.87,
        "stays": [],
        "axes": {
            "slew": "y",
            "joints": "x"
        },
        "units": "metres, radians",
        "runtime": "https://polyfork.dev/cdn/walk.mjs",
        "note": "two-link chain with a slew: the same solver the legged machines use. Joint ranges in `rig` are the real limits and the tip stops at them.",
        "how": "a slew and a two-link boom: aim the tip and solve, stopping at the joint ranges in rigged_parts. three.js users import https://polyfork.dev/cdn/walk.mjs and call arm(model, { rig, detach }).reachTo(point), where rig and detach are the asset module's own exports (import { createAsset, rig, detach } from the .mjs): the arm cannot find its joints without them"
    },
    "published_at": "2026-09-22 11:13:34",
    "renders": [
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/back.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/close.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/compare.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/detail.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/front.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/hero-crop.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/hero.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/left.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/low-back.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/low.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/pose-blade-lift.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/pose-blade-pitch.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/pose-blade-tilt.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/pose-idler-l.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/pose-idler-r.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/pose-ripper.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/pose-sprocket-l.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/pose-sprocket-r.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/pose-turntable.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/proof-blade.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/proof-phase.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/proof-wear.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/proofs.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/removed-blade-chain.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/right.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/top.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/under.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-angle-0.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-angle-1.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-blade-0.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-blade-1.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-colorway-clay-brown.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-colorway-hire-white.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-colorway-site-green.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-colorway-works-grey.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-load-spoil.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-pitch-0.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-pitch-1.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-ripper-0.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-ripper-1.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-tilt-0.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-tilt-1.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-tracks-narrow.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-tracks-wide.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-wear-0.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/variant-wear-1.png",
        "https://polyfork.dev/files/crawler-bulldozer-b851fb/renders/views.png"
    ],
    "license": "Mesh files (GLB, FBX, USD, OBJ): CC BY 4.0 with the line in `credit`, or the Polyfork licence with no credit and no redistribution, your choice. The .mjs source and the HD edition: Polyfork licence only, commercial use, no attribution, no redistribution. https://polyfork.dev/licensing",
    "credit": "Crawler Bulldozer by Polyfork (https://polyfork.dev/asset/crawler-bulldozer-b851fb), CC BY 4.0",
    "access": {
        "as": "anonymous",
        "remix_bakes_per_hour": 40,
        "remix_bakes_left_this_hour": 40,
        "remix_note": "The budget is on generating NEW geometry. Variations anyone has already baked are served to everybody and never counted, so re-fetching a variant you or anyone else has made costs nothing.",
        "remix_bakes_per_month": 100,
        "remix_bakes_left_this_month": 100,
        "remix_allowance_resets": "2026-12-01",
        "remix_allowance_note": "Anonymous callers are counted per IP address, so other sessions from the same address share this. A free account raises it to 300 a WEEK on its own budget, and costs an email address.",
        "a_free_account_adds": {
            "how": "Authorization: Bearer <key>, created at https://polyfork.dev/account. Costs an email address.",
            "remix_bakes_per_hour": 100,
            "remix_bakes_per_week": 300,
            "downloads": "every low poly model's .mjs program and a ready-to-serve zip from /dl, and any kit as one zip (/dl/kit-<id>.zip). The .glb, .fbx, .usdz, .usda and .obj need no key"
        },
        "pro_adds": {
            "url": "https://polyfork.dev/pricing",
            "usd_per_year": 149,
            "hd_editions": "the HD edition of a model: the same program built finer, high poly with PBR materials generated in code, every knob still working. 1,654 models have one. Free accounts get its public preview (/cdn/<id>-hd-preview.glb) only",
            "cdn": "a per-account /c/<token>/ path for the HD files you can hotlink from a shipped build; it keeps up when an asset is rebuilt, and the token is not the API key",
            "remix_bakes_per_hour": 900,
            "remix_bakes_per_week": "uncapped: a free account gets a weekly allowance, Pro does not"
        }
    }
}