sci-fi flying fortress 3d model

Massive sci-fi military Command Citadel HQ for floating naval base. Rugged industrial style, brutalist architecture, heavily fortified. Tall, multi-tiered structure with thick overlapping armor plating, visible bolts, and heavy rivets throughout. Prominent features: Large rotating radar dish complex on pinnacle, dense cluster of communications antennas, sensor spikes, and satellite uplinks. Narrow armored observation windows with internal cool cyan glow. Materials: Dark matte grey naval steel, heavily weathered texture with deep rust streaks, salt corrosion, and accumulated grime. Small orange industrial warning lights on corners. High detail game asset, sharp edges, realistic metal texture.