# How to flip the normals of partial cells of a polydata?

**URL:** https://discourse.vtk.org/t/how-to-flip-the-normals-of-partial-cells-of-a-polydata/7642
**Category:** Support
**Created:** [January 15, 2022, 7:24am UTC](https://discourse.vtk.org/t/how-to-flip-the-normals-of-partial-cells-of-a-polydata/7642 "2022-01-15T07:24:37Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![AlexLuya](https://discourse.vtk.org/user_avatar/discourse.vtk.org/alexluya/32/4036_2.png) [@AlexLuya](https://discourse.vtk.org/u/AlexLuya)
#### Post date: [January 15, 2022, 7:24am UTC](https://discourse.vtk.org/t/how-to-flip-the-normals-of-partial-cells-of-a-polydata/7642/1 "2022-01-15T07:24:37Z")

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Hello,I knew how to flip all normal of a poly data,the question is : how to flip the normals of partial cells of a poly data?