coastal concrete bunker 3d model

Realistic abandoned coastal concrete bunker, low rectangular military fortification, thick brutalist reinforced concrete structure, heavy blocky silhouette, narrow horizontal firing slit openings around the walls, partially buried into rocky ground, damaged chipped corners, broken concrete edges, erosion marks, exposed rough aggregate, cracked surfaces, weathered gray concrete with dark stains, white mineral streaks, rust-orange lichen and moss patches, dirt accumulation, salt damage, coastal wind erosion, uneven rocky base, bunker slightly asymmetrical and war-torn, game-ready hard-surface environment asset, highly detailed PBR material, photogrammetry style, realistic rough concrete texture, cinematic lighting, UE5 Nanite-ready, no people, no vehicles, no text.