// Create the geometry for the bone

let boneGeometry = new THREE.BoxGeometry(1, 1, 1);

​

// Create the material for the bone

let boneMaterial = new THREE.MeshBasicMaterial({ color: 0xffffff });

​

// Create the mesh for the bone

let boneMesh = new THREE.Mesh(boneGeometry, boneMaterial);

​

// Get the bone by its name

let bone = skinnedMesh.getBoneByName("boneName");

​

// Add the mesh to the bone

bone.add(boneMesh);