Create a detailed 3D model of a G.I. Joe–style military base inspired by classic 1980s toy playsets. Include modular fortress walls, a command tower, landing pad for jets or helicopters, watchtowers, armored gates, bunkers, supply crates, vehicle bays, and connecting ramps. The design should look toy-accurate but realistic, with crisp panel lines, ladders, radar dishes, and defense turrets. The scale should fit 1:18 action figures, and the structure should be segmented for modular assembly and easy 3D printing. Style keywords: G.I. Joe base, modular playset, military fortress, high detail, realistic toy aesthetic, STL-ready, optimized for FDM printing.