# anti-alias seems not working in QVTKOpenGLNativeWidget

**URL:** https://discourse.vtk.org/t/anti-alias-seems-not-working-in-qvtkopenglnativewidget/12979
**Category:** Support
**Created:** [December 29, 2023, 1:03am UTC](https://discourse.vtk.org/t/anti-alias-seems-not-working-in-qvtkopenglnativewidget/12979 "2023-12-29T01:03:21Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![Paulo\_Carvalho](https://discourse.vtk.org/user_avatar/discourse.vtk.org/paulo_carvalho/32/370_2.png) [@Paulo\_Carvalho](https://discourse.vtk.org/u/Paulo_Carvalho)
#### Post date: [January 5, 2024, 10:40am UTC](https://discourse.vtk.org/t/anti-alias-seems-not-working-in-qvtkopenglnativewidget/12979/4 "2024-01-05T10:40:14Z")

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Hello,

Can you try FXAA? FXAA is post-rendering, thus it can mitigate certain aliasing caused by some shaders MSAA is unable to handle. Maybe such shaders are involved in the case of the cubes 2-6. Either this or change the pink rectangles pipeline to that of the green one. BTW, why do you need `vtkGlyph3DMapper` instead of a common polydata mapper?

take care,

PC

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