post-apocalyptic city 3d model

Low poly 3D ruined petrified city overgrown with crystal veins and mutated vines, frozen mid-collapse from ancient apocalypse, staggered time decay across districts—nearby areas show fresh cracks with glowing purple petra-crystals erupting from buildings while distant skyline crumbles into dust-covered ruins, half-buried stone-age huts merging with fractured skyscrapers, eerie post-apocalyptic atmosphere, volumetric fog and god-rays piercing through shattered domes, game-ready topology under 10k tris, PBR textures with emissive crystal glow, UE4 optimized, isometric overview showing society progression from primitive camps to decayed megastructures