# Trace, clip, color bar scale range
**URL:** https://discourse.paraview.org/t/trace-clip-color-bar-scale-range/1728
**Category:** ParaView Support
**Created:** [April 27, 2019, 6:21pm UTC](https://discourse.paraview.org/t/trace-clip-color-bar-scale-range/1728 "2019-04-27T18:21:54Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@yamartinezgomez](https://discourse.paraview.org/u/yamartinezgomez)
#### Post date: [April 27, 2019, 6:21pm UTC](https://discourse.paraview.org/t/trace-clip-color-bar-scale-range/1728/1 "2019-04-27T18:21:54Z")
Hello,
I am recording a trace for two vtk files (each vtk file has its own renderview window) that takes and saves pictures (screenshots) of three different camera positions. The first two camera positions have a different angle of the vtk files. The last camera position includes clipping both vtk files on the X Normal. During the trace, all three pictures have the same color bar range.
When I replay the trace (using the same vtk files), the first two pictures (without clipping) look the same as the trace. However, the last picture (including the clipping), displays a different coloring and scaling range.
Is there anything I should include in my trace to keep all pictures with the same color bar range.
I appreciate any help.
Yvon,
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [April 29, 2019, 7:15am UTC](https://discourse.paraview.org/t/trace-clip-color-bar-scale-range/1728/2 "2019-04-29T07:15:12Z")
Looks like a bug, you could still add the command to set coloring and scaling before the screenshot.
You may want to provide a simple way to reproduce the issue.
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### Author:  [@yamartinezgomez](https://discourse.paraview.org/u/yamartinezgomez)
#### Post date: [April 29, 2019, 11:58am UTC](https://discourse.paraview.org/t/trace-clip-color-bar-scale-range/1728/3 "2019-04-29T11:58:01Z")
Mr. Westphal,
Thank you for your kind reply.
Would you mind helping me with where and what command should I activate before the screenshot? (There is a few that I do not know the difference between them).
I would greatly appreciate your feedback.
Thank you.
Yvon Martinez
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [April 29, 2019, 1:03pm UTC](https://discourse.paraview.org/t/trace-clip-color-bar-scale-range/1728/4 "2019-04-29T13:03:20Z")
It would be something like
```
# set scalar coloring
ColorBy(clip1Display, ('POINTS', 'RTData'))
# rescale color and/or opacity maps used to include current data range
clip1Display.RescaleTransferFunctionToDataRange(True, False)
# Rescale transfer function
rTDataLUT = GetColorTransferFunction('RTData')
rTDataLUT.RescaleTransferFunction(40.0, 250.0)
# Rescale transfer function
rTDataPWF = GetOpacityTransferFunction('RTData')
rTDataPWF.RescaleTransferFunction(40.0, 250.0)
```
---
### Author:  [@yamartinezgomez](https://discourse.paraview.org/u/yamartinezgomez)
#### Post date: [April 29, 2019, 2:56pm UTC](https://discourse.paraview.org/t/trace-clip-color-bar-scale-range/1728/5 "2019-04-29T14:56:23Z")
Mr. Westphal,
Thank you for your quick response.
The idea you have suggested in the previous email can potentially work. However, I am using this python script trace in a FOR LOOP to iterate over different “attributes” that have different scale ranges. For instance, if I set a specific value in the code you have provided, this would only work for the ‘RTData’. If I happen to have ‘DTData’, and ‘MTData’, I will most likely lose the value ranges for these other sets of attributes (the scale seems to be fixed for values between 40.0 to 250.0).
I was hoping that maybe if I click a button, i.e rescale to data range, could potentially help me with this issue. I do not want to use rescale to custom range since I would have to provide a manual input of hard values belonging to that specific attribute i.e ‘RTData’. I am looking to have some flexibility with the data ranges.
I very much appreciate any other ideas.
Thank you in advance.
Yvon,
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [April 29, 2019, 2:59pm UTC](https://discourse.paraview.org/t/trace-clip-color-bar-scale-range/1728/6 "2019-04-29T14:59:41Z")
For the first part, you can simply write this in python.
For the second part, the call is :
`wavelet1Display.RescaleTransferFunctionToDataRange(False, True)`