# How to change the volume rendering setting to make the rendering effect from picture1 to picture2

**URL:** <https://discourse.slicer.org/t/how-to-change-the-volume-rendering-setting-to-make-the-rendering-effect-from-picture1-to-picture2/24692>\
**Category:** Development\
**Tags:** vmtk\
**Created:** [August 9, 2022, 12:05pm UTC](https://discourse.slicer.org/t/how-to-change-the-volume-rendering-setting-to-make-the-rendering-effect-from-picture1-to-picture2/24692 "2022-08-09T12:05:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jay1987](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jay1987/32/16183_2.png) [@jay1987](https://discourse.slicer.org/u/jay1987)\
**Post date:** [August 9, 2022, 12:05pm UTC](https://discourse.slicer.org/t/how-to-change-the-volume-rendering-setting-to-make-the-rendering-effect-from-picture1-to-picture2/24692/1 "2022-08-09T12:05:39Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/7/c7258e4ecfd2c21b65065759a39ba267afdbffe5.jpeg)  
picture1:obtain the vessel scalar volume node from VMTK,use preset [Vesselness]

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/4/1/41f6d84e764c47ce6037ac73d4f810a66a1b2dda.jpeg)  
picture2:change vessel to segmentation,the rendering segmentation in 3D

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**Author:** ![mau\_igna\_06](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mau_igna_06/32/9056_2.png) [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Post date:** [August 9, 2022, 12:59pm UTC](https://discourse.slicer.org/t/how-to-change-the-volume-rendering-setting-to-make-the-rendering-effect-from-picture1-to-picture2/24692/2 "2022-08-09T12:59:54Z")

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You could try simpleitk sigmoidfilter (adjusting the parameters). It may help to enhance the vessels for later segmentation if the threshold is selected correctly…  
I think that effect you got is because you used islands effect to keep part of the vessels and not all of them

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**Author:** ![jay1987](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jay1987/32/16183_2.png) [@jay1987](https://discourse.slicer.org/u/jay1987)\
**Post date:** [August 9, 2022, 1:03pm UTC](https://discourse.slicer.org/t/how-to-change-the-volume-rendering-setting-to-make-the-rendering-effect-from-picture1-to-picture2/24692/3 "2022-08-09T13:03:15Z")

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thanks  
I can change the vessel volume rendering to model rendering and segmentation rendering to avoid this problem , maybe is the vmtk [vesselness] preset cause the opacity rendering , CT and MRI preset is fine