# Strange effect with unstructured mesh edges ON and high zoom levels

**URL:** https://discourse.vtk.org/t/strange-effect-with-unstructured-mesh-edges-on-and-high-zoom-levels/14817
**Category:** Support
**Created:** [November 2, 2024, 8:33pm UTC](https://discourse.vtk.org/t/strange-effect-with-unstructured-mesh-edges-on-and-high-zoom-levels/14817 "2024-11-02T20:33:10Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![santichialvo](https://discourse.vtk.org/user_avatar/discourse.vtk.org/santichialvo/32/1248_2.png) [@santichialvo](https://discourse.vtk.org/u/santichialvo)
#### Post date: [November 2, 2024, 8:33pm UTC](https://discourse.vtk.org/t/strange-effect-with-unstructured-mesh-edges-on-and-high-zoom-levels/14817/1 "2024-11-02T20:33:10Z")

</div>

Hi everyone,

I have a strange behavior with a simple unstructured mesh loaded as poly data, with the actor’s property edges visibility ON. It displays OK, however, when I start doing high zoom levels into specific elements (triangles) it seems that the element takes the whole color of the edge…

Here is a video showing the effect: [Recording #125](https://go.screenpal.com/watch/cZXnF7nc4F7)

In this case, I used red color for the edges, but if I use a different color (i.e. black) the effect is the same, the whole element takes the edge’s color. If I turn off edge visibility it stops reproducing. Any ideas on what might be happening?

I’m using QVTKOpenGLNativeWidget and VTK 9.2.6 or around that version.

Thanks in advance.