# 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:** 5

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### Author: ![baker-Xie](https://discourse.vtk.org/user_avatar/discourse.vtk.org/baker-xie/32/8169_2.png) [@baker-Xie](https://discourse.vtk.org/u/baker-Xie)
#### Post date: [January 5, 2024, 11:43am UTC](https://discourse.vtk.org/t/anti-alias-seems-not-working-in-qvtkopenglnativewidget/12979/5 "2024-01-05T11:43:16Z")

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Hi, I have tried FXAA, the result is not so good I think. The reason why I use vtkGlyph3DMapper is because I need to render thousands of cubes / arrow / sphere / or other source at 30fps. And those object s are changing all the time (color / size / pos / orientation).

BTW, I found why I can see edges in cube 2~6. Because they are transparent. I think I found a strange behaviour that vtk have. You can look at this link [object seems wrong rendered when transparency are used - Support - VTK](https://discourse.vtk.org/t/object-seems-wrong-rendered-when-transparency-are-used/13014)

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