Progettazione di stampi e colata > Working with Parting Surfaces > Filling Loops in a Parting Surfaces > To Fill a Loop Using a Flat or Revolved Surface
  
To Fill a Loop Using a Flat or Revolved Surface
1. Create other surface features, such as flat or revolved surfaces.
2. Merge these surface features into the parting surface.
Alternatively, you may copy the bottom surface with the hole filled, then merge this bottom surface into the parting surface.