Starting from the first curve on the back select all the other curves in a clockwise direction; doing this the opening of the surface will remain on the back.



The starting curve on the back of the model.

When all the curves are selected:

Surfaces > Loft In the Loft Option window click the Reset button and then check the close option box.



Loft Option window.

Click the Loft button and the tortoise-shell will be created. (Tip � Remember that since history is on in the Status Line, changing the shape of any of the curves will automatically change the shape of the tortoise-shell).



The Status Line.







Three different views of the tortoise-shell.

Once you have created the tortoise-shell using the "right number" of profiles, you can modify your model moving the CVs; if you need more detail you can insert new Isoparms.

* In the first case (to move the CVs) select the model, rightClick on it and in the menu select Control Vertex.
* In the second case (to add more detail) select the model, rightClick on it or anywhere in the workspace and in the menu select Isoparm; click one existing Isoparm and drag until the zone where you need more detail (to add more than one Isoparm use Shift). To add this new Isoparm to the model: Edit Surfaces > Insert Isoparms.