Create a low-poly, stylized 3D model of a military aircraft hangar for a Unity game, matching the aesthetic of army barracks. The hangar should be a semi-cylindrical Quonset hut-style structure with a green or camo-painted metal exterior and large sliding doors at the front. Add simple details like support beams, vents, and warning signs. Keep the design game-ready with no interior and optimized geometry for real-time rendering. The model should have a clean UV layout and be suitable for mobile or indie games