private void btnOpenSandbox_Click(object sender, RoutedEventArgs e)
        {
            var ofd = new OpenFileDialog();

            if ((bool)ofd.ShowDialog())
            {
                var h3 = new Halo3(ofd.FileName);
                lblSandboxPath.Text = ofd.FileName;

                var container = new Model3DCollection();
                foreach (var placedObject in h3.SandboxObjects.Where(placedObject => placedObject.TagIndex != -1))
                {
                    // Try to load Model
                    if (placedObject.TagEntry.Tag.TagPath.Contains("spawning"))
                    {
                    }

                    string gameAssetPath;
                    try
                    {
                        gameAssetPath = VariousFunctions.GetGameAsset(Halo3.GameId, placedObject.TagEntry.Tag.TagPath);
                    }
                    catch (FileNotFoundException)
                    {
                        ActionLog.AddEntry("Missing Game Asset");
                        continue;
                    }

                    var model = (Model3D)ModelImporter.Load(gameAssetPath);
                    model.Transform = CreateTransformGroup(placedObject);
                    container.Add(model);
                }

                ModelViewport.Children.Clear();
                ModelViewport.Children.Add(new GridLines());
                foreach (var model in container)
                {
                    ModelViewport.Children.Add(new ModelVisual3D
                    {
                        Content = model
                    });
                }
                var light        = new LightVisual3D();
                var ambientLight = new AmbientLight(Colors.WhiteSmoke)
                {
                    Transform = new MatrixTransform3D(new Matrix3D
                    {
                        OffsetX = 0,
                        OffsetY = 0,
                        OffsetZ = 100
                    })
                };
                light.Content = ambientLight;
                ModelViewport.Children.Add(light);

                ModelViewport.ShowCameraInfo = true;
                ModelViewport.ZoomExtents();
                ModelViewport.IsHeadLightEnabled = true;
            }
        }