3D Model: Modular 3D Creation Kit For A Realistic Underground Bunker Environment. Includes Wall Segments (straight, Corner, T-junction, End), Floor And Ceiling Tiles, Door Frames, Pipes, Beams, Pillars, Electrical Boxes, Air Ducts, And Control Panels. Each Piece Should Be Cleanly Modeled, Low To Mid Poly, With Simple UVs And Consistent Grid Scale (1m Units). Style Is Realistic-industrial, With Worn Metals, Concrete, And Slight Grunge. Designed To Snap Together Seamlessly In A Game Engine Like Unity Or Unreal Engine. Ideal For Level Building And Interior Design Of Cold War-era Bunkers.