Community simulations

Explore what runs.

Open a simulation, run it in your browser, then fork it to make it yours.

Type:

Featured simulations

Ancient River Forest — 1 km²

A seed-grown kilometre-square old-growth forest split by a winding river and sealed inside a ring of unclimbable mountains. Every hill, bank, tree, fern, stone, bark pattern, and water ripple is procedural.

Rapier Native Mechanics Lab

An advanced Rapier3D laboratory combining an articulated suspension bridge, motor joint, native character controller, sensor gate, ray queries, compound colliders, and CCD projectiles.

Kinetic Reactor Systems Lab

A dense Rapier3D systems test with spawning probes, collision capture, a moving gate, vortex forces, keyboard control, audio events, annotations, analytics, and runtime parameters.

Velocity Cube Lattice

A large NxNxN cube lattice where pressing F launches a projectile through the structure and colors cubes by velocity magnitude.

Daylight Domino Chain

A bright Rapier3D domino cascade with a tracked impact wave and lightweight HUD.

Daylight Particle Fountain

A sunny kinetic fountain of lightweight Rapier particles bouncing inside a shallow basin.

Presentation Overlay Lab

A Rapier scene built to test config-driven HUD, annotations, and analytics overlays.

3D Rigid Body Chaos

A high-performance demonstration of 3D physics using Rapier. Thousands of rigid bodies interacting in real-time, calculated via WebWorker and rendered natively with WebGL.

Procedural & Generation

Episodic Procedural Waves

A true procedural episodic simulation! Every 8 seconds, the Javascript custom logic completely rebuilds the 10,000+ vertex Trimesh into a newly shifted sine wave slope, and drops massive physics spheres on top of it using the dynamic physics diffing engine.

2D Rigid Body Physics

Full 2D rigid body physics powered by Rapier WASM. Real collision detection, dynamic/static/kinematic bodies, and boundary walls.

2D Platformer Sandbox

Use WASD to move and SPACE to jump! A multi-level 2D platformer powered entirely by native ECS physics.

3D Parkour Sandbox

Use WASD keys to roll the ball. Jump across platforms and don't fall off! Full 3D interactivity.

glTF Crate Drop

A demonstration of loading a real 3D model (glTF/GLB) into a physics simulation. A KhronosGroup sample Box.glb is loaded from the server, and its geometry is used for both rendering and Rapier3D trimesh collision.

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