# SetEdgeVisibility(1) in VTK 9.1 is now wrong in many models

**URL:** <https://discourse.vtk.org/t/setedgevisibility-1-in-vtk-9-1-is-now-wrong-in-many-models/8728>\
**Category:** Development\
**Created:** [June 15, 2022, 1:36am UTC](https://discourse.vtk.org/t/setedgevisibility-1-in-vtk-9-1-is-now-wrong-in-many-models/8728 "2022-06-15T01:36:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![LexaMark](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lexamark/32/5342_2.png) [@LexaMark](https://discourse.vtk.org/u/LexaMark)\
**Post date:** [June 15, 2022, 1:36am UTC](https://discourse.vtk.org/t/setedgevisibility-1-in-vtk-9-1-is-now-wrong-in-many-models/8728/1 "2022-06-15T01:36:54Z")

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Some discussions are in another page in the Support category while this problem should be in the development category.

[Edge Show](https://discourse.vtk.org/t/inner-edge-display-for-quadric-element-is-not-correct-for-version-9-1/7665/4)

> [@inner edge display for quadric element is not correct for version 9.1](https://discourse.vtk.org/t/inner-edge-display-for-quadric-element-is-not-correct-for-version-9-1/7665/4):
>
> Dear Cory Quammen and Mathieu Westphal, thanks for your reply. Below is the sample code i used to test and generate above images. void testReadPolydata(int argc, char\* argv[]) { vtkNew\<vtkXMLPolyDataReader\> reader; reader-\>SetFileName(argv[1]); reader-\>Update(); auto poly = reader-\>GetOutput(); vtkNew\<vtkOpenGLPolyDataMapper\> mapper; mapper-\>SetInputData(poly); vtkNew\<vtkActor\> actor; actor-\>SetMapper(mapper); actor-\>GetProperty()-\>SetEdgeVisibility(1); …

 ![AnotherModel](https://discourse.vtk.org/uploads/default/original/2X/8/8269942aa9d05d42fa7a103b714d8a1492d11aa5.png)