Low Poly City and Building Kit Generator

A city is never one model, it is a kit. Our generator approaches urban environments as a modular library of buildings, roads, sidewalks, and props designed to snap onto a tile grid. Because every piece aligns to the same module size, you can assemble a sprawling downtown from a handful of reusable parts: flat-roofed offices, gabled houses, corner shops, and filler blocks that repeat without looking obviously cloned. This kit-of-parts approach is the foundation of every great city-builder and strategy map, and it keeps your project organized as it scales.

Performance in a city scene is dominated by sheer object count, so the math matters. We keep individual buildings extremely light, typically 200 to 800 triangles each, because you may have hundreds or thousands of them visible at once. With GPU instancing, the engine can render thousands of copies of a single building mesh in essentially one draw call, which is the only way a dense skyline runs smoothly. Pairing instancing with draw-call batching for unique structures keeps the whole city well within a real-time frame budget on both desktop and mobile.

The tile-based layout is what unlocks instancing and procedural generation alike. Each building, road, and plaza occupies a clean grid cell with a consistent pivot at the tile origin, so placement is just a snap to the nearest cell. That regularity lets you author cities by hand in an editor, generate them procedurally at runtime, or stream them in chunks as the player scrolls. The isometric and strategy camera angles that suit these scenes also hide the low per-building detail, letting flat-color and baked-gradient textures carry the look.

Texturing stays deliberately economical. Windows, doors, signage, and roof details are baked into a single shared atlas, usually 1024 to 2048 pixels, so an entire neighborhood draws from one material. Flat color and baked ambient occlusion give the city depth without normal maps or per-building textures that would multiply memory and draw calls. This is the discipline that lets a city of thousands of buildings load fast and run cool, especially important on the web where bandwidth is the bottleneck.

For delivery, GLB is the standout format for cities. It bundles geometry, materials, and the shared atlas into one self-contained binary that streams cleanly into Three.js, Godot, and the browser, which is exactly what you want when loading a large scene over the network. You can split the city into GLB chunks and stream them progressively so the player sees the skyline assemble rather than waiting on one giant download. For engine-side editing in Unity or Unreal use FBX, which preserves the kit hierarchy and pivots; use OBJ for static exchange. Everything you generate is yours commercially with no attribution required.

A typical pipeline: generate the building kit, confirm each piece snaps to your tile size and shares the atlas, then mark repeated buildings for instancing. Lay out the grid by hand or with a procedural placer, batch the unique structures, and split the result into streaming GLB chunks for the web or an FBX kit for Unity. Recolor the atlas to shift between districts, day and night, or seasons, and you have a flexible, performant city that scales from a small village to a metropolis.