An example of an asymmetrical model is a figure
            that is posed with one arm raised above its head, while the other
            is lowered. In these sculpting situations you need to explicitly
            define an axis of symmetry.
         
         TipCreate a new layer
               for your sculpting work when planning to use layer symmetry. You
               can merge the two layers when you are finished.
            
         
            - Set the topological axis you want the
               symmetry to occur across before you perform any sculpting. For more
               information, see 
                        Set a topological axis.
            
- Sculpt on one half of the model.
            
- In the Layers menu,
               select Layer > Mirror and select Tangent to
               specify that you want the mirror copy to occur across the topological
               axis you previously set.