# Help with segment editor sphere brush

**URL:** <https://discourse.slicer.org/t/help-with-segment-editor-sphere-brush/8002>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [August 13, 2019, 3:05pm UTC](https://discourse.slicer.org/t/help-with-segment-editor-sphere-brush/8002 "2019-08-13T15:05:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Roni](https://avatars.discourse-cdn.com/v4/letter/r/eada6e/32.png) [@Roni](https://discourse.slicer.org/u/Roni)\
**Post date:** [August 13, 2019, 3:05pm UTC](https://discourse.slicer.org/t/help-with-segment-editor-sphere-brush/8002/1 "2019-08-13T15:05:53Z")

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Hi There,

I am trying to use the spere brush option for thresholded segmentation in “segment editor” module.  
specifications:

Slicer version: 4.10.2  
OS: windows  
Data : 3D (dicom2nii converted)  
Expected behaviour: using one step of paint along with sphere brush, to segment a structure from all slices.(Expect volume filled with label number in Y and G view panel)  
Actual behaviour: sphere brush functanality does not work for entire volume. Paint is only applied on single slice.(check Y and G view panel)

Any guidance or help is really helpful. I have tried to follow the youtube tutorial  
[segment editor Tutorial](https://www.youtube.com/watch?v=55cqpl8_b8c)

 ![3d%20slicer%20brush](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/e/eee553fab12c414a85dcb21a562a0094fa834959.png)

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [August 13, 2019, 3:19pm UTC](https://discourse.slicer.org/t/help-with-segment-editor-sphere-brush/8002/2 "2019-08-13T15:19:16Z")

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Looks like the brush radius is smaller than the slice spacing. What happens if you use a bigger radius?