The Duplicate tool takes care of three things. It first duplicates all points, edges and faces in the selected object. Then it finds all open edges in the original and duplicated faces and connects them with an appropriate number of new faces. Finally, the tool selects the duplicated faces so that you can immediately move, mirror, scale or otherwise transform them.

1. Go to the Select Window's geometry tab and click the right mouse button. A pop-up menu is opened. Select Paste from a file option and load the 'tutorprojects/modeling/sds/halfhead' object.

2. Select the loaded face and enter 'Face' mode by selecting the near southeast compass menu.

3. Click the Duplicate tool.

Duplicate tool

Note: Duplicate tool automatically selects the duplicated part of the object. Be careful not to change the selection, because re-selecting the exactly overlapping faces is very difficult. If you accidentally change the selection, undo the 'Duplicate' operation and execute it again.

4. Activate the Mirror tool; it's located in the Transformation tab.

Mirror tool

Then enter two points through the view window to define vertical mirroring axis.

The result is a complete face. The tool connects also the back, top and bottom sides of the face. If this is undesirable, select the connecting faces using the top view and apply the 'Destroy F' tool to them.

A cube is an object, which clearly has an axis of symmetry: its left and right side faces are identical. So, we only have to create one face and get the other face by using the Duplicate tool. Side faces are created automatically by the tool.

Activate the SDS Rectangle tool...

1. Create a SDS rectangle consisting of 2x2 points.

2. Select the rectangle and enter the face editing mode. Now the control bar shows you all the SDS specific tools. Click the Duplicate tool.

This duplicates the single face of the rectangle object and creates four new faces to connect the edges of the original and the new face.

Note: the tool automatically selects the duplicated face.

3. Activate the Transformation/Move tool and enter two points through the view window to displace the duplicated face from its original position.

In this example, we create an object used by body builders to train their biceps.

1. Activate the SDS/Rectangle tool. This time set the resolution to 8x4 through the control bar (U=8, V=4).

The Duplicate tool finds all open edges in the surface to be extruded, including 'holes':

1. Create a SDS rectangle consisting of 8 x 8 control points.

2. Enter the face editing mode and delete a couple of faces from the mesh using the 'Destroy F' tool.

Destroy Face tool

3. Click the Duplicate tool and use the Move tool to move the duplicated faces apart from the original faces.

In this example, we create a coffee cup by modeling the outer surface for the cup first. The inner surface for the cup is created with the 'Duplicate' tool (the inner surface is otherwise identical to the outer surface but slightly smaller).

1. Take a top view and create a SDS sphere. take a front view and select the faces near the north pole as shown in the image.

Select two opposite faces

We could create a handle for the cup as demonstrated in some of the earlier tutorials. However, let's be more creative this time. The cup has a round base, and therefore it is not a practical cup to use. We can duplicate and mirror the cup in vertical direction to create a proper base for it. 4. Select two opposite faces near the bottom of the cup.

5. Click the 'Destroy F' tool to delete the selected faces. This creates two rectangular holes in the outer surface of the cup. Click 'Duplicate' and then use the 'Mirror' transformation tool to flip the duplicated faces under the cup as shown in the image on the right.