Four metre boardwalk module: a 1.2 m plank deck on steel legs 0.45 m above the ground with a single hand rail, the route a survey team lays across crust too sharp to walk on. Free 3D model for volcanic terrain, lava field and natural disaster game scenes in Unity, Godot, Unreal, three.js and Blender. Overall 1.20 by 1.40 by 4.00 m (X by Y by Z). Metre units, +Y up, the front face toward +Z, resting on y=0 with the origin on the footprint. On the 4 m grid: walk ports at both ends at deck height, so modules chain into a route of any length across the ground tiles. Static geometry; no rig, collision or navigation data. Molten rock and glow seams are emissive geometry, never lights: the pack embeds no lights, and lava flow, steam, smoke and fire are static because a fluid needs a shader or a particle system that a rigid node transform cannot carry. A generic volcanic landscape: no real volcano, park, observatory or equipment maker is named or depicted, and every sign, plate and marker face is blank.