Mold Design and Casting > Working with Volumes > Gathering Volumes > Excluding Surfaces and Outer Loops > Example: Excluding Outer Loops
  
Example: Excluding Outer Loops
1. Select the multiple surfaces of the cylinder as shown in 1.
2. Select the top surface of the cylinder as shown in 2.
3. Click Exclude > Loops and select the edge of the outer cylinder volume as shown in 3.