Upgrade Godot's Physics & Fluid Simulation with Rapier 💧

Rapier is a Rust-based physics engine available as a GDExtension for Godot, offering a drop-in replacement for Godot's built-in 2D physics with better stability and parallelism. It comes in four variants (2D/3D, cross-platform/native) and is MIT-licensed. A standout feature is fluid simulation support, allowing developers to add water-like effects with configurable properties such as viscosity, elasticity, surface tension, and density. The 2D implementation is mature and recommended over 3D, which still lags behind alternatives like Jolt Physics. Installation is straightforward via Godot's asset library, and switching physics engines requires only a settings change and restart.