Now that you have learned what a lattice in Maya is and what it can do, let's dive into how to deform the sheet to make it look more realistic. First of all you need to select the lattice by clicking on it, or by using the Outliner, as i have described in the previous page.Then using the channel box in Maya, change the values of the lattice as shown in the figure.

The FFD (Free form Deformation) lattice in Maya has divisions along all the three dimensions which are designated as S, T, and U divisions. When you increase the S divisions to 5, you gets more lattice points along that plane, so that you can control that region more finely. Learning to increase and decrease these values as per your requirement , is the key to using lattices effectively in Maya. You will learn when to increase / decrease the control points with practice.

I would recommend that you save the scene now and play around with the lattice, moving various lattice points and see how it affect the shape of the underlying object in Maya. Also try selecting some lattice points and rotating them using the Rotate tool. Once you are done with your experiment, either do an undo or load back the saved scene. I strongly recommend that you practise a lot working with lattice, since it is a powerful tool in Maya.

Note: The next thing that you need to do once you are done using a lattice to deform an object, is to remove the lattice from the object's construction history. Otherwise, later if you move the base object without moving the lattice along with it, weird results will be obtained.

Select the base object; i.e. the sheet object and choose Edit > Delete By Type > History from the main menu bar in Maya. This will remove the lattice from the object's history, but the deformation that it has caused will remain. Always remember to do this once you are done deforming a object using a lattice.