# Opacity issue paraview 5.11

**URL:** https://discourse.paraview.org/t/opacity-issue-paraview-5-11/11278
**Category:** ParaView Support
**Created:** [January 26, 2023, 10:13pm UTC](https://discourse.paraview.org/t/opacity-issue-paraview-5-11/11278 "2023-01-26T22:13:46Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![Ali\_Rahnama](https://discourse.paraview.org/user_avatar/discourse.paraview.org/ali_rahnama/32/5391_2.png) [@Ali\_Rahnama](https://discourse.paraview.org/u/Ali_Rahnama)
#### Post date: [January 26, 2023, 10:13pm UTC](https://discourse.paraview.org/t/opacity-issue-paraview-5-11/11278/1 "2023-01-26T22:13:46Z")

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Showing contours with opacity less than one makes buggy on paraview 5.11 when it’s running through python. One of my friends has experience same issue on paraview software itself.

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### Author: ![cory.quammen](https://discourse.paraview.org/user_avatar/discourse.paraview.org/cory.quammen/32/11193_2.png) [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [January 26, 2023, 11:27pm UTC](https://discourse.paraview.org/t/opacity-issue-paraview-5-11/11278/2 "2023-01-26T23:27:02Z")

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Please describe in detail the bug you are seeing.

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### Author: ![Ali\_Rahnama](https://discourse.paraview.org/user_avatar/discourse.paraview.org/ali_rahnama/32/5391_2.png) [@Ali\_Rahnama](https://discourse.paraview.org/u/Ali_Rahnama)
#### Post date: [January 30, 2023, 2:28am UTC](https://discourse.paraview.org/t/opacity-issue-paraview-5-11/11278/3 "2023-01-30T02:28:39Z")

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If I start to zoom in and out, there are some angles that the slice will get invisible.  
The only solution that I could find was to have opacity of 1 (this bug wasn’t in the earlier versions)

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### Author: ![Ali\_Rahnama](https://discourse.paraview.org/user_avatar/discourse.paraview.org/ali_rahnama/32/5391_2.png) [@Ali\_Rahnama](https://discourse.paraview.org/u/Ali_Rahnama)
#### Post date: [February 10, 2023, 3:04am UTC](https://discourse.paraview.org/t/opacity-issue-paraview-5-11/11278/4 "2023-02-10T03:04:33Z")

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any ideas?

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### Author: ![timothee.chabat](https://discourse.paraview.org/user_avatar/discourse.paraview.org/timothee.chabat/32/5729_2.png) [@timothee.chabat](https://discourse.paraview.org/u/timothee.chabat)
#### Post date: [February 10, 2023, 1:32pm UTC](https://discourse.paraview.org/t/opacity-issue-paraview-5-11/11278/5 "2023-02-10T13:32:53Z")

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Hello @Ali_Rahnama ,

in you first message you’re talking of contours and in your 2nd you’re talking about slices. Please add explicit steps on how to reproduce your issue.

I tried some stuff on my side but couldn’t reproduce.