threejs skybox 배경

// 하늘 시작 배열 
  const skyMaterialArray = []
  const texture_ft = new THREE.TextureLoader().load(  '../static/img/skybox_front.png')
  const texture_bk = new THREE.TextureLoader().load( '../static/img/skybox_back.png')
  const texture_up = new THREE.TextureLoader().load( '../static/img/skybox_up.png')
  const texture_dn = new THREE.TextureLoader().load( '../static/img/skybox_down.png')
  const texture_rt = new THREE.TextureLoader().load( '../static/img/skybox_right.png')
  const texture_lf = new THREE.TextureLoader().load( '../static/img/skybox_left.png')

  skyMaterialArray.push(
    new THREE.MeshBasicMaterial({
      map: texture_ft,
    })
  )
  skyMaterialArray.push(
    new THREE.MeshBasicMaterial({
      map: texture_bk,
    })
  )
  skyMaterialArray.push(
    new THREE.MeshBasicMaterial({
      map: texture_up,
    })
  )
  skyMaterialArray.push(
    new THREE.MeshBasicMaterial({
      map: texture_dn,
    })
  )
  skyMaterialArray.push(
    new THREE.MeshBasicMaterial({
      map: texture_rt,
    })
  )
  skyMaterialArray.push(
    new THREE.MeshBasicMaterial({
      map: texture_lf,
    })
  )
  for (let i = 0; i < 6; i++) {
    skyMaterialArray[i].side = THREE.BackSide;
  }
  // 하늘 배경 박스에 적용
  const skyGeometry = new THREE.BoxGeometry(1500, 1500, 1500);
  const sky = new THREE.Mesh(skyGeometry, skyMaterialArray);
  scene.add(sky);

//하늘배경 끝

안보여서 카메라 깊이를 3000 정도로 키워주었더니 보임. 

camera = new THREE.PerspectiveCamera(50,window.innerWidth/window.innerHeight,1,3000);

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배경

https://opengameart.org/content/space-nebulas-skybox

Space Nebulas Skybox