urban city 3d model

Create a realistic 3D urban city model with roads, intersections, sidewalks, streetlights, trees, residential and commercial buildings, schools, hospitals, and industrial areas. Beneath the city, include a complete underground drainage network visible through a cutaway section of the terrain. The drainage system should contain large trunk sewers, medium collector pipes, small branch pipes, manholes, inspection chambers, storm drains, and realistic pipe junctions with gravity-based flow routing. Show clear connections between road-side drains and underground pipes. Include smart monitoring nodes mounted inside selected manholes, featuring enclosed sensor units, ultrasonic sensors, LoRa communication modules, batteries, and mounting brackets. Use realistic engineering proportions, clean topology, optimized geometry, separate infrastructure layers, and a professional civil-engineering digital twin style suitable for Blender, Unreal Engine, Unity, and technical presentations.