3D Building Mechanics Complete building system for Three.js games with performance optimization, structural physics, and multiplayer networking. Quick Start Reference Files Read these for detailed implementation guidance: - - Spatial partitioning, chunk loading, instancing, LOD - - Arcade vs heuristic vs realistic physics - - Authority models, delta sync, conflict resolution Scripts Performance (references/performance-at-scale.md) - - O(1) queries for uniform distribution - - Adaptive queries for clustered bases - - World streaming for large maps - - Benchmarking utilities Structural Physics…