🏙️ Procedural Grid Island City: Walk, Drive, Cycle and Fly Explorer

Generate a fictional dense island city from a seed - a rotated avenue grid, a diagonal avenue, a big park, rivers with bridges and skyscraper clusters - then walk, drive, cycle or fly a helicopter through it with day/night and weather. Includes bid-rent height scaling, IDM traffic with a fundamental diagram and walking-time checks. Inspired by Manhattan-style grids; not a real map. Animated, auto-rigged pedestrians walk the sidewalks and wait at red signals.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install