使用laya生成默认的微信小游戏项目，稍微修改其代码，增加https://github.com/layabox/layaair-doc/tree/master/Chinese/LayaAir_AS3/3D/examples
示例里下载的girl.lh文件，在laya内测试正常加载显示，代码如下：

// 程序入口
class LayaAir3D {
    /*3D场景*/
    private scene:Laya.Scene;
    /*3D角色*/
    private role:Laya.Sprite3D;
    /*3D摄像机*/
    public camera:Laya.Camera;

    constructor() {
        //初始化微信小游戏
        Laya.MiniAdpter.init();
        //初始化引擎
        Laya3D.init(0, 0, true);

        //适配模式
        Laya.stage.scaleMode = Laya.Stage.SCALE_FULL;
        Laya.stage.screenMode = Laya.Stage.SCREEN_NONE;

        //开启统计信息
        // Laya.Stat.show();

        //添加3D场景
        this.scene = Laya.stage.addChild(new Laya.Scene()) as Laya.Scene;

        //添加照相机
        this.camera = (this.scene.addChild(new Laya.Camera(0, 0.1, 100))) as Laya.Camera;
        this.camera.transform.translate(new Laya.Vector3(0, 3, 3));
        this.camera.transform.rotate(new Laya.Vector3(-30, 0, 0), true, false);
        this.camera.clearColor = null;

        //添加方向光
        var directionLight: Laya.DirectionLight = this.scene.addChild(new Laya.DirectionLight()) as Laya.DirectionLight;
        directionLight.color = new Laya.Vector3(0.6, 0.6, 0.6);
        directionLight.direction = new Laya.Vector3(1, -1, 0);

        //添加自定义模型
        var box: Laya.MeshSprite3D = this.scene.addChild(new Laya.MeshSprite3D(new Laya.BoxMesh(1, 1, 1))) as Laya.MeshSprite3D;
        box.transform.rotate(new Laya.Vector3(0, 45, 0), false, false);
        var material: Laya.StandardMaterial = new Laya.StandardMaterial();
        material.diffuseTexture = Laya.Texture2D.load("res/layabox.png");
        box.meshRender.material = material;

        //加载3D资源
        Laya.loader.create(["res/LayaScene_girl/girl.lh"],Laya.Handler.create(this,this.on3DComplete));
    }
    /*加载3D资源完成回调*/
    private on3DComplete():void{
        //创建3D角色
        //实例化角色
        this.role = Laya.loader.getRes("res/LayaScene_girl/girl.lh");
        this.scene.addChild(this.role);
        //角色位置
        this.role.transform.position = new Laya.Vector3(0,1,2);
    }
}

new LayaAir3D();

但发布到微信工具运行失败，提示错误如下：

Wechat Lib:1.8.0, 2017.12.22 16:03:55
code.js:104 Warning!,this class[MiniAdpter] already exist: Object
code.js:25623 ShaderCompile use time:5  size:4472/6067
code.js:25623 ShaderCompile use time:3  size:177/148
code.js:92311 Warning: discard property,please use transform's property instead.
code.js:21065 Object
WAGame.js:3 gameThirdScriptError
Sprite3D: The .lh file root type must be Sprite3D,please use other function to  load  this file.;at api readFile success callback function

[b]Error: Sprite3D: The .lh file root type must be Sprite3D,please use other function to  load  this file.
    at Sprite3D.__proto.onAsynLoaded (http://127.0.0.1:51205/game/code.js:82641:10)
    at ResInfo.onLoaded (http://127.0.0.1:51205/game/code.js:12995:61)
    at EventHandler.__proto.runWith (http://127.0.0.1:51205/game/code.js:711:59)
    at ResInfo.__proto.event (http://127.0.0.1:51205/game/code.js:483:28)
    at LoaderManager.__proto._endLoad (http://127.0.0.1:51205/game/code.js:13152:11)
    at Loader.onLoaded (http://127.0.0.1:51205/game/code.js:13128:10)
    at EventHandler.__proto.runWith (http://127.0.0.1:51205/game/code.js:711:59)
    at Loader.__proto.event (http://127.0.0.1:51205/game/code.js:483:28)
    at Loader.__proto.endLoad (http://127.0.0.1:51205/game/code.js:12740:8)
    at Function.Loader.checkNext (http://127.0.0.1:51205/game/code.js:12769:40)[/b]
console.error

errorReport @ WAGame.js:3
thirdErrorReport @ WAGame.js:3
(anonymous) @ WAGame.js:3
c @ WAGame.js:4
(anonymous) @ WAGame.js:4
function.setTimeout @ gamePage.html:1
(anonymous) @ WAGame.js:3
(anonymous) @ WAGame.js:5
ontimeout @ timers.js:469
tryOnTimeout @ timers.js:304
listOnTimeout @ timers.js:264

另外导入unity的其他导出文件，如为天空盒加载贴图文件也会提示错误。请问是语法错误还是什么问题？还是微信或真机上不支持？