Snowmobile

Note: Size: 3.42 m long from the bumper to the snow flap, 1.25 m wide across the skis (1.1 m ski stance), 1.32 m tall to the windshield top and 1.65 m to the whip-flag tip. The seat is at 0.86 m. The origin is at the bottom centre, the skis and the track lugs rest on y = 0, and the nose faces +Z. The GLB has 2,160 triangles in 49 meshes and uses all 12 kit palette colours. Every material is named exactly after its colour; the exporter writes one material per mesh, so names repeat, so recolour by name. The baked clip scene-motion (6 s, seamless) moves only parts on their own pivots: the handlebar swings about the 20-degree raked steering post, both skis steer by the same angle about their vertical spindles, the 0.12 m track wheels spin 2 whole turns and the 0.08 m mid wheel 3 turns, and the whip flag sways from its socket. The body never moves. The track belt itself is a rigid mesh, so its lugs do not travel round the belt; only the wheels inside it turn. The GLB's static node pose is the t = 2 s frame (three-check exports after its determinism seek), so the skis and handlebar are slightly turned in the static pose. glb-lint reports bounds y down to -0.011 m: it bounds each mesh's box after rotation, and the box corners of the spinning wheels dip at that pose. The real wheel rims stay 3 cm above the ground, and every unrotated mesh bottoms out at exactly y = 0. Params are baked into the GLB at their defaults and only change the model when the scene is rebuilt in the viewer. snowDepth (the kit's 'Snow depth') packs snow on the running boards, the ski tops and the crate lid, from an 8 mm frost film at 0 to 8 cm at 1. steerAngle sets the steering amplitude of the loop. windshieldHeight sets how far the windshield rises above the hood. Only the default params were rendered and checked; the extremes were not captured. The viewer's stage floor is recoloured mid grey so the white panels and snow read; it is outside the export. glb-lint: 0 errors and 5 heuristic warnings. They flag the per-mesh duplicate materials, the non-indexed geometry (deliberate flat shading), overlaps where hood, tunnel and seat parts are deliberately nested, and the windshield and snow as 'detached': each sits embedded in or resting on the hood and boards, but in its own part group. The verdict reads UNVERIFIED only because no requirements contract was supplied. plan-check passes except for its part-id regex, which rejects the hyphens in the slug-based ids this library requires; the same plan with the slug de-hyphenated passes. three-check accepts the real ids, and all 17 survive the GLB reload.