# How can I access data from renderWindow?

**URL:** <https://discourse.slicer.org/t/how-can-i-access-data-from-renderwindow/15130>\
**Category:** Development\
**Created:** [December 18, 2020, 7:09am UTC](https://discourse.slicer.org/t/how-can-i-access-data-from-renderwindow/15130 "2020-12-18T07:09:14Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Tesla2678](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/tesla2678/32/9062_2.png) [@Tesla2678](https://discourse.slicer.org/u/Tesla2678)\
**Post date:** [December 18, 2020, 7:09am UTC](https://discourse.slicer.org/t/how-can-i-access-data-from-renderwindow/15130/1 "2020-12-18T07:09:15Z")

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Hello There,

I want to make the slicer showed in the “Red” widget curve.  
From

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/2/8214b843bac794024d97f40cecd09bf0051b5786.jpeg)  
To  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/e/0eebbf9ca4a4c5f690a2725126fe3783b8aa576b.jpeg)

In order to do this, I am trying to get slice data before it was rendered.  
I have no idea how to do this, I can only get the “renderWindow” from each “sliceView”.  
How can I access the slice data and process it?

> > > renWin=slicer.app.layoutManager().sliceWidget(“Red”).sliceView().renderWindow()

> > > render=renWin.GetRenderers().GetFirstRenderer()

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<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [December 19, 2020, 6:15am UTC](https://discourse.slicer.org/t/how-can-i-access-data-from-renderwindow/15130/2 "2020-12-19T06:15:17Z")

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A post was merged into an existing topic: [How to make the slicer displayed bend?](https://discourse.slicer.org/t/how-to-make-the-slicer-displayed-bend/15067)

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<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [December 19, 2020, 6:15am UTC](https://discourse.slicer.org/t/how-can-i-access-data-from-renderwindow/15130/3 "2020-12-19T06:15:17Z")

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