A smooth green sphere inside three smoothed iron rings set at three different tilts, so the cage never presents the same profile twice as it turns. A six-point bolt glyph is extruded 0.035 m proud of both poles of the sphere and a small dome caps the top ring crossing. Bounding size 0.30 by 0.30 by 0.29 m; metres, +Y up, +Z forward. Origin: free, at the centre of the orb, because a collectible like this is hung in mid-air at whatever hover height the level needs and a base origin would put it on the floor. The geometry surrounds the origin, reaching 0.150 m below it and 0.150 m above it. Clips: bob (2.0 s), spin (2.0 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.