The revolving door seems lonely, spinning by itself in the viewport. You can use the Merge command to put this revolving door into context, by merging in a scene of an entranceway.
You'll also learn to animate the opening of parametric doors.
After you click the file name, the Merge File dialog displays a thumbnail of the scene.
If the Duplicate Name dialog appears, click Skip for any duplicate objects.
The spinner arrows are now outlined in red, indicating that Open is an animated parameter that has a key on the current frame.
The revolving doors go around and the double doors swing open.
You can use the track bar to make the double doors open and close faster.
The doors open and close more quickly.
You can make the doors open and close repeatedly throughout the animation by using Track View.
A Track View – Curve Editor window opens with the Double doors Open parameter highlighted.
If you don't see this button, then right-click a blank area of the Track View toolbar, and from the pop-up menu choose Show
Toolbars Curves: Track View.
Click OK to accept the change and close the dialog, and then close the Selected track view dialog.
You can find a finished version of the scene in revolving_door_final.max.
In this tutorial you learned to get around the 3ds Max Design user interface, and to do some simple modeling and animation. You learned to work with primitive objects and apply and edit materials. You created a door object, made clones of it, and linked the doors to a parent object in order to make an animation. Lastly, you learned to merge files together to create a more complex scene.