Subject: Military base entrance gate, fortified structure, large and imposing. Style: Realistic, industrial military design, detailed geometry, HDR lighting. Material: Reinforced concrete with weathering, steel doors with rivets, barbed wire accents. Details: High-security barriers, watchtower elements, heavy-duty mechanisms, worn textures. Purpose: Architectural render for game environments, VR-ready, 4K optimized, HDR realism.