# Scalar opacity mapping in volume renderer does not save the midpoint and sharpness of midpoint in scene

**URL:** https://discourse.slicer.org/t/scalar-opacity-mapping-in-volume-renderer-does-not-save-the-midpoint-and-sharpness-of-midpoint-in-scene/31380
**Category:** Feature requests
**Created:** [August 26, 2023, 2:43pm UTC](https://discourse.slicer.org/t/scalar-opacity-mapping-in-volume-renderer-does-not-save-the-midpoint-and-sharpness-of-midpoint-in-scene/31380 "2023-08-26T14:43:46Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![ga1g](https://avatars.discourse-cdn.com/v4/letter/g/cc9497/32.png) [@ga1g](https://discourse.slicer.org/u/ga1g)
#### Post date: [August 26, 2023, 2:43pm UTC](https://discourse.slicer.org/t/scalar-opacity-mapping-in-volume-renderer-does-not-save-the-midpoint-and-sharpness-of-midpoint-in-scene/31380/1 "2023-08-26T14:43:46Z")

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Hi,  
I use midpoint and sharpness of midpoint in the scalar opacity mapping window in the volume renderer advanced option. It works ok.  
When I save the scene and reload it - these values are not saved, so the 3D rendering is different from what I saved.  
Can you add these parameters to the saved scene?  
Thx,  
Gal.

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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: [August 26, 2023, 9:44pm UTC](https://discourse.slicer.org/t/scalar-opacity-mapping-in-volume-renderer-does-not-save-the-midpoint-and-sharpness-of-midpoint-in-scene/31380/2 "2023-08-26T21:44:37Z")

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Thanks for raising this. This is indeed a current limitation that we will address if this feature request receives sufficient number of votes.