You will use the primitive Tube object with the Slice option to create an enclosure for the revolving door.

Set up the lesson:

1. Continue with your scene from the previous lesson, or open revolving_door_enclosure.max from the startup folder.
2. Right-click the Perspective viewport to activate it, and then click (Maximize Viewport Toggle). This button is at the extreme lower right of the 3ds Max Design window.

Create another layer:

1. On the Layers toolbar, click (Create New Layer).

   This creates a new layer.

2. Name the Layer Enclosure.

   The Move Selection To New Layer setting should be off. If you leave this on, the hub will be moved from the previous layer to the new layer.

   Click OK.

   The Enclosure layer is now visible in the Layer Properties field.

Create the tube:

1. On the navigation controls, click (Zoom Extents) to zoom back so you can see the area around the cylinder.
2. On the Create panel Object Type rollout, click Tube.

   The Tube button highlights, indicating it is active and ready for use.

   
3. Drag out a tube anywhere in the viewport.

   The size doesn't matter; you'll be changing it in a moment.

   

   Make a tube.

4. In the Parameters rollout on the Create panel, change Radius 1 to 6' 0.0".
5. Change Radius 2 to 5' 11.0"
6. Change Height to 7' 0.0".
   

   Change the radius and height of the tube.

7. If necessary, zoom out so you can see both the tube and the cylinder.

Align the tube:

Next, you'll center the tube over the cylinder.

1. On the toolbar, click Align.

   The tube is already selected, so you'll align it to the cylinder.

2. Click the cylinder in the viewport.
3. In the Align Selection (Cylinder01) dialog Align Position (World) group, turn on X Position, Y Position, and Z Position. Choose Pivot Point for both Current Object and Target Object. Click OK.
   

   The tube is centered over the cylinder.

   

   On the Create panel, in the Name And Color group, rename the Tube object left enclosure panels.

Slice the tube:

1. Go to the Modify panel.
2. On the Parameters rollout, turn on Slice On.
3. Adjust the Slice From and Slice To values so you have a half of a tube visible in the viewport, resembling the illustration. Start with 90.0 and –90.0, and adjust if necessary. The difference between the two values should be 180.
   

   Slice the tube

4. Change Sides to 6. The enclosure will be created out of flat panels, rather than curved glass.
5. Change Height Segments to 1.
   

   Lower the number of faces.

   Next you'll clone the tube to create the other side of the enclosure.

Clone the tube:

1. On the main toolbar, click (Select And Rotate).
2. On the keyboard, press A to turn on Angle Snap.
3. Hold down the Shift key and rotate the left enclosure 180 degrees about the Z axis.

   A copy of the tube rotates into place on the other side of the enclosure.

4. When the copy of the tube is in the proper position, release the mouse button.

   3ds Max Design opens the Clone Options dialog.

5. On the dialog, set the Object option to Copy and name the clone right enclosure panels. Click OK.
   
6. Adjust the Slice values so the tube resembles the illustration below. Try setting Slice From = 45 and Slice To = –45.0.

   Depending how you constructed the initial tube, you might have different values. The difference between the two should be a multiple of 90.

7. Change the Sides value to 3.
   

   Left and right enclosures

   You'll do some more work on the enclosures in a while, but first you'll construct the revolving door.

Save your work:

• Save the scene as my_enclosure.max.