I've been trying to set a "mouseover" effect that gives transparency to the box geometry only, but this applies also on the ground geometry and I'm not able to exclude the ground form this effect, any suggestions on how to achieve this? I think I need to pass some arguments in intersectObject (scene.somenthing)

import * as THREE from '../../build/three.module.js';
import { OrbitControls } from '../../src/OrbitControls.js';

var controls;

const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
const pointer = new THREE.Vector2(1,1);
const raycaster = new THREE.Raycaster();

const renderer = new THREE.WebGLRenderer({alpha:false,antialias:true});
renderer.setSize( window.innerWidth, window.innerHeight );

document.body.appendChild( renderer.domElement );

const light = new THREE.AmbientLight(0x303030);
const dLight = new THREE.DirectionalLight(0xffffff, 0.5);

light.add(dLight);
scene.add(light);

const geometry = new THREE.BoxGeometry(50,0.1,50);
const material = new THREE.MeshPhysicalMaterial( { color: 0x0fa8dc } );
const ground = new THREE.Mesh( geometry, material );

scene.add( ground );
camera.position.set(5,15,15);

controls = new OrbitControls(camera, renderer.domElement);
controls.maxPolarAngle = Math.PI / 2.1; 

//Raycaster reset materials
function resetMaterials() {
    for ( let i = 0; i < scene.children.length; i ++ ) {
        if  (scene.children[i].material) {
            scene.children[i].material.opacity = 1;
        }
    }
}

//raycast hover
function hoverObject() {
    raycaster.setFromCamera( pointer, camera );
    const intersects = raycaster.intersectObjects( scene.children );
    for ( let i = 0; i < intersects.length; i ++ ) {
        intersects[ i ].object.material.transparent = true;
        intersects[ i ].object.material.opacity = 0.75;
    }
}

function animate() {
    controls.update()
    requestAnimationFrame( animate );
    camera.lookAt(ground.position)
    resetMaterials()
    hoverObject()
    renderer.render( scene, camera );

}
animate();

function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize( window.innerWidth, window.innerHeight );
    }
   
//on pointer mover
function onPointerMove( event ) {
    pointer.x = ( event.clientX / window.innerWidth ) * 2 - 1;
    pointer.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
}

window.addEventListener('resize', onWindowResize); 
window.addEventListener( 'mousemove', onPointerMove, false );

const boxGeometry = new THREE.BoxGeometry(6, 6, 6);
const boxMaterial = new THREE.MeshPhongMaterial( { color: 0xffc000 } );
const box = new THREE.Mesh( boxGeometry, boxMaterial);

box.position.set(0,3,0);

scene.add(box);