# Issue with opacity setting through Trace option
**URL:** https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302
**Category:** ParaView Support
**Created:** [July 25, 2019, 10:22pm UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302 "2019-07-25T22:22:05Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@benoitpaillard](https://discourse.paraview.org/u/benoitpaillard)
#### Post date: [July 25, 2019, 10:22pm UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/1 "2019-07-25T22:22:05Z")
Hi all, I found a buggy behavior when using the “start Trace” method to script a process.
Getting a screenshot with a modified opacity gives an empty window when using Trace in 5.6, try script attached.
Using save state to a .py file does work though.[test.py](https://discourse.paraview.org/uploads/short-url/jLmqNB8eitY8KqgfSYtLZaqDmcz.py) (2.8 KB)
Cheers
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 26, 2019, 7:46am UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/2 "2019-07-26T07:46:21Z")
No problem on Linux here :
What I did :
- Download your script
- Open ParaView 5.6 release for Linux
- View -\> Python Shell
- Run Script -\> test.py
- View and screenshot are fine.
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### Author:  [@benoitpaillard](https://discourse.paraview.org/u/benoitpaillard)
#### Post date: [July 26, 2019, 7:52am UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/3 "2019-07-26T07:52:37Z")
I fully agree, however launching it from the command line - which is what I’m doing since the process is automatic -, does not work.
Try:
pvpython test.py
pvbatch test.py
Thank you for your help.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 26, 2019, 7:54am UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/4 "2019-07-26T07:54:49Z")
`pvpython test.py` generates a perfect screenshot and no window, which is expected.
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### Author:  [@benoitpaillard](https://discourse.paraview.org/u/benoitpaillard)
#### Post date: [July 26, 2019, 8:12am UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/5 "2019-07-26T08:12:45Z")
Hi,
Through paraview gui, I get:
Through pvpython I get : 
Please also find enclosed a screenshot of my PV config 
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 26, 2019, 8:32am UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/6 "2019-07-26T08:32:41Z")
Could you try with our last release 5.6.1 or with our last RC, 5.7.1-RC1 ?
[https://www.paraview.org/download/](https://www.paraview.org/download/)
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### Author:  [@benoitpaillard](https://discourse.paraview.org/u/benoitpaillard)
#### Post date: [July 26, 2019, 8:45am UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/7 "2019-07-26T08:45:52Z")
All good with both newer versions. Sorry for that. Should have checked.
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### Author:  [@benoitpaillard](https://discourse.paraview.org/u/benoitpaillard)
#### Post date: [July 26, 2019, 9:38am UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/8 "2019-07-26T09:38:56Z")
Hello again,
Actually it does work with osmesa version, but not with ParaView-5.7.0-RC1-MPI-Linux-64bit
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 26, 2019, 9:53am UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/9 "2019-07-26T09:53:00Z")
I can’t reproduce sadly. What is your GPU ?
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### Author:  [@benoitpaillard](https://discourse.paraview.org/u/benoitpaillard)
#### Post date: [July 26, 2019, 2:27pm UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/10 "2019-07-26T14:27:19Z")
The same issue happens on various NVIDIA chips, under ubuntu and the messy graphic driver… it might be the issue.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 31, 2019, 8:16am UTC](https://discourse.paraview.org/t/issue-with-opacity-setting-through-trace-option/2302/11 "2019-07-31T08:16:10Z")
If you could be more specific, I could try to reproduce.