Ascent skybox code

skybox.js

function(scene, options){
  var opts = tools.mixin({
    folder: 'textures/skybox/default/',
    filetype: 'png',
    size: 1000000
  }, options || {});

  var urls = [];

  ['x','y','z'].forEach(function(axis){
    urls.push(opts.folder + 'pos' + axis + '.' + opts.filetype);
    urls.push(opts.folder + 'neg' + axis + '.' + opts.filetype);
  });
  var textureCube = THREE.ImageUtils.loadTextureCube(urls);

  var shader = THREE.ShaderUtils.lib["cube"];
  shader.uniforms["tCube"].texture = textureCube;

  var material = new THREE.ShaderMaterial({
    fragmentShader: shader.fragmentShader,
    vertexShader: shader.vertexShader,
    uniforms: shader.uniforms,
    depthWrite: false
  });

  var mesh = new THREE.Mesh(new THREE.CubeGeometry(opts.size, opts.size, opts.size, 1, 1, 1, null, true), material);
  mesh.flipSided = true;
  scene.add(mesh);
}