无法更改材质的纹理-SparkAR v89?

请求纹理、材质和场景对象需要一些时间。从v85版本开始,对于这些事情,您需要使用如下方法 findFirst 在 Promise.All 块只需将对纹理和材质的请求转移到您请求的同一块 plane4

const Materials = require('Materials');
const Textures = require('Textures');
const Scene = require('Scene');

Promise.all([

    Scene.root.findFirst('plane4'),
    Scene.root.findFirst('ipad-perfect'),
    Scene.root.findFirst('iphone-perfect'),
    Scene.root.findFirst('computer-perfect'),
    Materials.findFirst('bg'),
    Materials.findFirst('mutablescreen'),
    Textures.findFirst('unnamed-min')


]).then(function (results) {

    const plane4 = results[0];

    const ipadPerfect = results[1];
    const iphonePerfect = results[2];
    const computerPerfect = results[3];
    const bgMat = results[4];
    const mutableScreen = results[5];
    const texture = results [6];

    // Get the timer ready
    start();

    function start() {


      bgMat.diffuse = texture;
      bgMat.emission = texture;
      mutableScreen.diffuse = texture;
      mutableScreen.emission = texture;