text: class SkyBoxMaterial extends Material {
  
      constructor(vertexShader, fragmentShader) {
          super({
              'skybox': { type: 'CubeTexture', value: null }
          }, [], vertexShader, fragmentShader, null);
      }
  }
  
  async function buildSkyBoxMaterial(vertexPath, fragmentPath) {
      
  
      let vertexShader = await getShaderString(vertexPath);
      let fragmentShader = await getShaderString(fragmentPath);
  
      return new SkyBoxMaterial(vertexShader, fragmentShader);
  
  }