Every wall is four boards with a 12 mm gap between them, two rails and two iron corner brackets, and each wall has its pivot on the bottom edge it would fall from. The break clip holds the crate intact through a 0.3 s shudder, then throws the lid up and the four walls outward with a tumble, so the destroyed state needs no second model. Bounding size 0.80 by 0.83 by 0.80 m; metres, +Y up, +Z forward. Origin: ground contact at y=0, centred on the footprint, because a crate stands on its own floor panel. Clips: break (1.6 s). Rigid node animation only: named nodes with translation, rotation and scale clips, no skinned rig and no skeleton. No collision volumes and no navigation data. Opaque materials throughout; the pack uses no alpha blending and no transmission.