# greyed out feature edges filter

**URL:** https://discourse.paraview.org/t/greyed-out-feature-edges-filter/8544
**Category:** ParaView Support
**Created:** [December 2, 2021, 9:29am UTC](https://discourse.paraview.org/t/greyed-out-feature-edges-filter/8544 "2021-12-02T09:29:01Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![parailjar](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/p/54ee81/32.png) [@parailjar](https://discourse.paraview.org/u/parailjar)
#### Post date: [December 2, 2021, 9:29am UTC](https://discourse.paraview.org/t/greyed-out-feature-edges-filter/8544/1 "2021-12-02T09:29:01Z")

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I’m trying to extract the data on the feature edges of my model, however it is greyed out for some reason. The other filters are working fine. See picture.

 ![image](https://discourse.paraview.org/uploads/default/original/2X/e/eb884d758365cd2d52b181b4b024f6cac39c6e08.png)

Paraview can read the feature edges as is displayed in the lower picture, so my question is as follows. How can I apply the feature edge filter?

 ![image](https://discourse.paraview.org/uploads/default/original/2X/c/c690cc5ea3734a28ae4f605728c8751aa0f8dc02.png)

With kind regards,

Iljar Dickhof

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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: [December 2, 2021, 9:37am UTC](https://discourse.paraview.org/t/greyed-out-feature-edges-filter/8544/2 "2021-12-02T09:37:26Z")

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Use ExtractSurface filter first.