| Cannot sculpt on an existing
                           layer. A message appears indicating that the sculpt layer is locked
                           to another subdivision level.
                         | Determine whether the
                           layer is currently available for sculpting. If a red No Sculpting
                           symbol appears beside a layer name, it indicates that the subdivision
                           level currently displayed does not match the level on which the
                           layer was created.
                         Ensure the current subdivision
                           level matches the level that the layer was created on. Use the Page
                              Up or Page Down keys to display the
                           subdivision level that matches the level number indicated beside the
                           layer. When the red No Sculpting symbol disappears it indicates
                           that the layer and subdivision level match correctly.
                         |