Load PLY with multiple textures

Questions
,
1

I’m trying to load a PLY file with multiple PNG textures. I’m able to load the PLY with one texture, but fail to do so in the case of multiple texture files. When I execute the code, I don’t see any geometry and I don’t receive any errors in the console. I know where the mesh should arrive in the scene…

const textureLoader = new THREE.TextureLoader();
const plyMaterial = [
    new THREE.MeshBasicMaterial({map: textureLoader.load('models/Wall_u1_v1.png') }),
    ... (14 PNG textures in total)
    new THREE.MeshBasicMaterial({map: textureLoader.load('models/Wall_u4_v3.png') }),
];
const loader = new THREE.PLYLoader();
loader.load(
    pathToPLY,
    function ( plyGeometry ) {
        var plyMesh = new THREE.Mesh ( plyGeometry, plyMaterial );
        plyMesh.castShadow = true;
        plyMesh.receiveShadow = true;
        scene.add( plyMesh );
    },
    function ( xhr ) { console.log( (xhr.loaded / xhr.total * 100) + '% loaded' ); },
    function( err ) { console.log( 'An error happened' ); }
)