rusty metal barrier 3d model

Create a photorealistic modular urban metal barrier fence for a zombie apocalypse game, inspired by old European bicycle railings made from thick black iron pipes and welded posts. The fence has been abandoned outdoors for 20 years after societal collapse. Heavy rust, peeling black paint, corrosion, dents, bent rails, grime, moss, scratches, chipped metal, and weather damage. Uneven and slightly warped structure with realistic decay from rain, pollution, and neglect. Industrial city infrastructure style, waist height, gritty and believable. Include subtle bicycle chain scrape marks, cracked concrete mounts, and dirt buildup near the base. Game-ready asset with PBR textures, realistic roughness, metallic, normal, and ambient occlusion maps. Dark oxidized iron with orange-brown rust variation. No clean surfaces, no futuristic design, no cartoon style, no polished metal.