// --- Dust Particle System Function ---
function createDust() {
    const particleCount = 2000;
    const particlesGeometry = new THREE.BufferGeometry();
    const positions = [];

    for (let i = 0; i < particleCount; i++) {
        positions.push(
            (Math.random() - 0.5) * 15, 
            Math.random() * 10,        
            (Math.random() - 0.5) * 15  
        );
    }
    // Use THREE.Float32BufferAttribute to correctly set the position attribute
    particlesGeometry.setAttribute('position', new THREE.Float32BufferAttribute(positions, 3));

    const particleMaterial = new THREE.PointsMaterial({
        color: 0xffffff,
        size: 0.015,
        transparent: true,
        opacity: 0.08, 
        blending: THREE.AdditiveBlending
    });

    dust = new THREE.Points(particlesGeometry, particleMaterial);
    // Dust particles generally don't cast or receive shadows in this context
    scene.add(dust);
}