# Scalar Color Mapping widget is missing in Volume Rendering

**URL:** <https://discourse.slicer.org/t/scalar-color-mapping-widget-is-missing-in-volume-rendering/19715>\
**Category:** Support\
**Created:** [September 17, 2021, 2:00am UTC](https://discourse.slicer.org/t/scalar-color-mapping-widget-is-missing-in-volume-rendering/19715 "2021-09-17T02:00:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [September 17, 2021, 2:00am UTC](https://discourse.slicer.org/t/scalar-color-mapping-widget-is-missing-in-volume-rendering/19715/1 "2021-09-17T02:00:19Z")

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This is with 9-15 Preview on windows:

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/3/c368383dd1bf48576d2bc7fa6d2b8b52f7961d11.png)

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [September 17, 2021, 3:49am UTC](https://discourse.slicer.org/t/scalar-color-mapping-widget-is-missing-in-volume-rendering/19715/2 "2021-09-17T03:49:56Z")

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OK. I have no idea what happened. Restarted the application it is there now!

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/2/22c6b609c309f5e55f51c07f913f7bb71e28813e.png)

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**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:** [September 18, 2021, 12:06am UTC](https://discourse.slicer.org/t/scalar-color-mapping-widget-is-missing-in-volume-rendering/19715/3 "2021-09-18T00:06:11Z")

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This is a feature that probably has not been announced properly [until now](https://discourse.slicer.org/t/color-rgb-volume-rendering/19732). When you load a color (RGB or RGBA) volume then it is rendered using the color stored in each voxel. Since no scalar-\>color mapping is performed, the “Scalar Color Mapping” section is not displayed.