Feature External Edges Only

I am trying to display only the outside edges/outline of a VTK object by using the ‘Feature Edges’ representation.
However, I am only interested in the external outline shape of the vtk object and not the internal outlines.

Attached is a picture of the internal and external outlines dislayed by the ‘Feature Edges’.

I appreciate any help.

Use ExtractSurface filter first.

That is what I did in order to apply the Feature Edge representation but it display what I was expecting.
Is there another solution?

Perhaps there are some discontinuities in the mesh representation that the feature extraction thinks are boundaries to your mesh. Try running the Clean To Grid filter before the Extract Surface filter.

That worked perfectly!
Thank you!