# Feature External Edges Only

**URL:** https://discourse.paraview.org/t/feature-external-edges-only/2812
**Category:** ParaView Support
**Tags:** vtk
**Created:** [October 21, 2019, 6:39am UTC](https://discourse.paraview.org/t/feature-external-edges-only/2812 "2019-10-21T06:39:07Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![yamartinezgomez](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/y/e5b9ba/32.png) [@yamartinezgomez](https://discourse.paraview.org/u/yamartinezgomez)
#### Post date: [October 21, 2019, 6:39am UTC](https://discourse.paraview.org/t/feature-external-edges-only/2812/1 "2019-10-21T06:39:08Z")

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Hello!  
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’.

 ![image](https://discourse.paraview.org/uploads/default/original/2X/7/7309dde99e308399699cff61fb0efbed728fdec6.png)

I appreciate any help.

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [October 21, 2019, 6:39am UTC](https://discourse.paraview.org/t/feature-external-edges-only/2812/2 "2019-10-21T06:39:41Z")

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Use ExtractSurface filter first.

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### Author: ![yamartinezgomez](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/y/e5b9ba/32.png) [@yamartinezgomez](https://discourse.paraview.org/u/yamartinezgomez)
#### Post date: [October 21, 2019, 1:14pm UTC](https://discourse.paraview.org/t/feature-external-edges-only/2812/3 "2019-10-21T13:14:10Z")

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

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### Author: ![Kenneth\_Moreland](https://discourse.paraview.org/user_avatar/discourse.paraview.org/kenneth_moreland/32/15033_2.png) [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [October 22, 2019, 10:00pm UTC](https://discourse.paraview.org/t/feature-external-edges-only/2812/4 "2019-10-22T22:00:06Z")

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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.

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### Author: ![yamartinezgomez](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/y/e5b9ba/32.png) [@yamartinezgomez](https://discourse.paraview.org/u/yamartinezgomez)
#### Post date: [October 23, 2019, 2:11pm UTC](https://discourse.paraview.org/t/feature-external-edges-only/2812/5 "2019-10-23T14:11:26Z")

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That worked perfectly!  
Thank you!