city landscape 3d model

Create a massive realistic 16km x 16km open-world 3D map with modern cities, detailed villages, highways, parks, forests, rivers, railway tracks, train stations, industrial zones, bridges, farmland, and realistic terrain variation. The environment should feature realistic buildings, residential areas, commercial districts, street lights, traffic roads, rail networks, suburban towns, lakes, trees, mountains, and cinematic open-world level design with optimized game-ready geometry. Use realistic textures, natural lighting, smooth terrain blending, detailed infrastructure, believable urban planning, and immersive environmental storytelling suitable for Unreal Engine, Godot, Unity, or Blender; avoid low-poly, cartoon, empty terrain, repetitive assets, or unrealistic layouts.