강의에서 나온 이미지 색상보다 더 밝게 나와요

위의 사진처럼 강의보다 훨씬 밝게 나오는데 문제가 무엇일까요..?

import * as THREE from "three";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
// ----- 주제: 여러 이미지 텍스쳐가 적용된 큐브

export default function example() {
  // 로딩 매니저
  const loadingManager = new THREE.LoadingManager();
  loadingManager.onStart = () => {
    console.log("시작");
  };
  loadingManager.onLoad = () => {
    console.log("로드 완료");
  };
  loadingManager.onProgress = (img) => {
    console.log(img + "로드 중");
  };
  loadingManager.onError = () => {
    console.log("로드 에러");
  };

  // 텍스쳐 이미지 로드
  const textureLoader = new THREE.TextureLoader(loadingManager);
  const rightTex = textureLoader.load("/textures/mcstyle/right.png");
  const leftTex = textureLoader.load("/textures/mcstyle/left.png");
  const topTex = textureLoader.load("/textures/mcstyle/top.png");
  const bottomTex = textureLoader.load("/textures/mcstyle/bottom.png");
  const frontTex = textureLoader.load("/textures/mcstyle/front.png");
  const backTex = textureLoader.load("/textures/mcstyle/back.png");

  const materials = [
    new THREE.MeshBasicMaterial({ map: rightTex }),
    new THREE.MeshBasicMaterial({ map: leftTex }),
    new THREE.MeshBasicMaterial({ map: topTex }),
    new THREE.MeshBasicMaterial({ map: bottomTex }),
    new THREE.MeshBasicMaterial({ map: frontTex }),
    new THREE.MeshBasicMaterial({ map: backTex }),
  ];

  // 픽셀화
  rightTex.magFilter = THREE.NearestFilter;
  leftTex.magFilter = THREE.NearestFilter;
  topTex.magFilter = THREE.NearestFilter;
  bottomTex.magFilter = THREE.NearestFilter;
  frontTex.magFilter = THREE.NearestFilter;
  backTex.magFilter = THREE.NearestFilter;

  // Renderer
  const canvas = document.querySelector("#three-canvas");
  const renderer = new THREE.WebGLRenderer({
    canvas,
    antialias: true,
  });
  renderer.setSize(window.innerWidth, window.innerHeight);
  renderer.setPixelRatio(window.devicePixelRatio > 1 ? 2 : 1);

  // Scene
  const scene = new THREE.Scene();
  scene.background = new THREE.Color("white");

  // Camera
  const camera = new THREE.PerspectiveCamera(
    75,
    window.innerWidth / window.innerHeight,
    0.1,
    1000
  );
  camera.position.y = 1.5;
  camera.position.z = 4;
  scene.add(camera);

  // Light
  const ambientLight = new THREE.AmbientLight("white", 0.5);
  scene.add(ambientLight);

  const directionalLight = new THREE.DirectionalLight("white", 1);
  directionalLight.position.set(1, 1, 2);
  scene.add(directionalLight);

  // Controls
  const controls = new OrbitControls(camera, renderer.domElement);

  // Mesh
  const geometry = new THREE.BoxGeometry(2, 2, 2);
  const mesh = new THREE.Mesh(geometry, materials);
  scene.add(mesh);

  // 그리기
  const clock = new THREE.Clock();

  function draw() {
    const delta = clock.getDelta();

    renderer.render(scene, camera);
    renderer.setAnimationLoop(draw);
  }

  function setSize() {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.render(scene, camera);
  }

  // 이벤트
  window.addEventListener("resize", setSize);

  draw();
}