tunnel boring machine 3d model

--background: transparent OR neutral-gray (RGB 238,238,238). remove all other objects and environment; isolate only the yellow construction machine; no people, no rocks, no crates. high-res, photorealistic 3D studio render, no compositing artifacts, sharp details, even soft shadow on ground, clean rim light. output PNG with alpha. Subject: industrial yellow tunnel-boring / trench-cutting vehicle (exactly like reference). Left/front dominated by a large circular cutter-head (drum) with multiple conical carbide teeth and replaceable bolted picks. Cutter drum is heavily used: chipped yellow paint, rust streaks, exposed dark steel edges at tooth roots, small welding repairs, grease buildup around bearings. Body: compact crawler-style base, heavy hydraulic arms connecting drum to main chassis. Arm geometry: triangular truss reinforcement with visible weld beads and bolted joints. Thick hydraulic cylinders with hoses (black rubber) and orange insulated power conduits bundled along the chas