Edit in JSFiddle

<canvas id="renderCanvas"></canvas>

html, body {
    overflow: hidden;
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

#renderCanvas {
    touch-action: none;
    width: 100%;
    height: 100%;
}

console.log("hello");
var Scene = (function ()
{
    var _canvas = null;
    var _engine = null;
    var _scene = null;

    var _Create = function (canvasID)
    {
        _canvas = document.getElementById(canvasID);
        _engine = new BABYLON.Engine(_canvas, true);

        document.addEventListener('contextmenu', function (event) { event.preventDefault(); }, false);

        BABYLON.SceneLoader.Load("", "https://dl.dropboxusercontent.com/s/wjvobkacnyvxgp3/CristmasTreeScene.babylon", _engine,
            function (newScene)
            {
                newScene.executeWhenReady(function ()
                {
                    _scene = newScene;
                    var light = new BABYLON.DirectionalLight("DirectionalLight", new BABYLON.Vector3(-1, -1, -1), _scene);
                    var light2 = new BABYLON.HemisphericLight("HemiLight", new BABYLON.Vector3(0, 1, 0), _scene);
                    light2.diffuse = new BABYLON.Color3(0.2, 0.2, 0.2);
                    light2.specular = new BABYLON.Color3(0, 0, 0);
                    var camera = new BABYLON.ArcRotateCamera("Camera", 30 * Math.PI / 180, 70 * Math.PI / 180, 15, new BABYLON.Vector3(0, 2, 0), _scene);
                    camera.minZ = 0.1;
                    camera.wheelPrecision = 100;
                    _scene.activeCamera = camera;
                    camera.attachControl(_canvas, true);
                    //_scene.activeCamera.attachControl(_canvas);

                    var planeMesh = _scene.meshes[1];
                    var planeMaterial = new BABYLON.StandardMaterial("planeMat", _scene);
                    planeMaterial.diffuseTexture = new BABYLON.Texture("https://dl.dropboxusercontent.com/s/wwpenimo7hcee7g/TexturesCom_SnowPlain_3x3_512_albedo.png");
                    planeMaterial.invertNormalMapX = true;
                    planeMaterial.invertNormalMapY = true;
                    var planeNormalTexture = new BABYLON.Texture("https://dl.dropboxusercontent.com/s/oubt7a1o0gln21j/TexturesCom_SnowPlain_3x3_512_normal.png", _scene);
                    planeMaterial.bumpTexture = planeNormalTexture;
                    planeMesh.scaling.x = 100;
                    planeMesh.scaling.z = 100;
                    planeMaterial.diffuseTexture.uScale = 100;
                    planeMaterial.diffuseTexture.vScale = 100;
                    planeMaterial.bumpTexture.uScale = 100;
                    planeMaterial.bumpTexture.vScale = 100;
                    planeMesh.material = planeMaterial;

                    var firMesh = _scene.meshes[0];
                    var firMaterial = new BABYLON.StandardMaterial("firMat", _scene);
                    firMaterial.diffuseTexture = new BABYLON.Texture("https://dl.dropboxusercontent.com/s/lgbzq4hfrwjs9eu/CristmasTreeScene.png");
                    firMaterial.diffuseTexture.hasAlpha = true;
                    firMaterial.backFaceCulling = false;
                    // firMaterial.sideOrientation = BABYLON.Mesh.DOUBLESIDE;
                    firMesh.material = firMaterial;

                    // Skybox
                    var skybox = BABYLON.MeshBuilder.CreateBox("skybox", { size: 1000 }, _scene);
                    skybox.infiniteDistance = true;
                    var skyboxMaterial = new BABYLON.StandardMaterial("skybox", _scene);
                    skyboxMaterial.backFaceCulling = false;
                    var files = [
                        "https://dl.dropboxusercontent.com/s/d6pb1vco30tb1qd/skybox_px.jpg",
                        "https://dl.dropboxusercontent.com/s/j8r319homxctq46/skybox_py.jpg",
                        "https://dl.dropboxusercontent.com/s/owtkos3hjayv819/skybox_pz.jpg",
                        "https://dl.dropboxusercontent.com/s/fn49xqtrz18h6vn/skybox_nx.jpg",
                        "https://dl.dropboxusercontent.com/s/jdtd2cgpe13930o/skybox_ny.jpg",
                        "https://dl.dropboxusercontent.com/s/shin4itwifrypl5/skybox_nz.jpg",
                    ];
                    skyboxMaterial.reflectionTexture = BABYLON.CubeTexture.CreateFromImages(files, _scene);
                    skyboxMaterial.reflectionTexture.coordinatesMode = BABYLON.Texture.SKYBOX_MODE;
                    skyboxMaterial.diffuseColor = new BABYLON.Color3(0, 0, 0);
                    skyboxMaterial.specularColor = new BABYLON.Color3(0, 0, 0);
                    skybox.material = skyboxMaterial;

                    _Animate();
                });
            });
    };

    var _Animate = function ()
    {
        _engine.runRenderLoop(function ()
        {
            _scene.render();
        });

        window.addEventListener("resize", function ()
        {
            _engine.resize();
        });
    };

    var mPublic = {
        Create: _Create
    };
    return mPublic;
}());

function main()
{
    Scene.Create("renderCanvas");
}
main();