尝试将界面HUD绘制到单独的Canvas（实际代码用PIXI.js创建Canvas), 然后将该Canvas作为纹理绘制到THREE.js 3D的Mesh中， 模拟器和iOS能正常显示纹理，Android显示为黑色，如果将getContext('webgl')改为getContext('2d')然后fillRect, 几种平台都能正常显示。 猜测，在Android下只能获取一个webgl Canvas var canvas = wx.createCanvas();      ...     var gl = this.canvas.getContext('webgl', {});     gl.clearColor(1.0, 0.0, 0.0, 1.0);     gl.clear(gl.COLOR_BUFFER_BIT|gl.DEPTH_BUFFER_BIT); ...     var texture = new THREE.CanvasTexture(canvas);     texture.minFilter = THREE.LinearFilter;     var material = new THREE.MeshBasicMaterial({ map: texture, transparent: true });    var geometry = new THREE.PlaneGeometry(canvas.width / window.devicePixelRatio / PIXELS_PER_UNIT,                                                                           canvas.height / window.devicePixelRatio / PIXELS_PER_UNIT);     var sprite3D = new THREE.Mesh(geometry, material);    ...     scene3D.add(sprite3D); 测试问题机： 小米8，小米MIX