Configure the physics environment for your scene:

// Setup physics with Ammo.js
// First, ensure Ammo.js is loaded
// <script src="https://cdn.babylonjs.com/ammo.js"></script>

// Initialize Ammo
await Ammo();

// Create physics plugin
const gravityVector = new BABYLON.Vector3(0, -9.81, 0);
const physicsPlugin = new BABYLON.AmmoJSPlugin();

// Enable physics in the scene
scene.enablePhysics(gravityVector, physicsPlugin);

// Configure physics engine properties
scene.getPhysicsEngine().setSubTimeStep(0.01); // For more accurate simulation

// Set global collision margin (Ammo.js specific)
physicsPlugin.setDefaultNonContactCustomMaterial({
    friction: 0.3,
    restitution: 0.3
});