Godot Physics 3d

This is the reference you want open when you're building anything physics-heavy in Godot 4's 3D engine. It covers the full stack: ragdolls with PhysicalBone3D, custom constraint solvers using PhysicsDirectSpaceState3D, vehicle suspension tuning for Jolt, and collision layer architecture that won't kill your frame rate. The "never" list alone is worth it, especially the warnings about moving physics bodies in _process() and scaling collision shapes directly. Includes ready-to-use scripts for everything from thousands of bullets via PhysicsServer3D RIDs to proper stair detection with ShapeCast3D. If you're past the tutorial phase and need production-ready physics patterns, this has the depth.