ruined city environment 3d model

Realistic destroyed city zombie survival map for mobile FPS. Collapsed buildings, accessible rooftops, ladders, limited ziplines, rubble streets, burned cars, narrow alleys, chokepoints, vertical gameplay, multiple paths, natural cover, blocked areas. Add smoke, fire, debris, broken roads. Multiple enemy spawn routes from alleys and buildings. Dark, gritty, cinematic, realistic, no stylized, no sci-fi, no clean surfaces. modular structures, game-ready assets, clean topology, medium-sized map (~100x100 meters), compact but dense layout, designed for continuous action