# How to smooth a volume rendering

**URL:** <https://discourse.slicer.org/t/how-to-smooth-a-volume-rendering/1370>\
**Category:** Support\
**Created:** [November 3, 2017, 10:54pm UTC](https://discourse.slicer.org/t/how-to-smooth-a-volume-rendering/1370 "2017-11-03T22:54:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![AndFor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/andfor/32/822_2.png) [@AndFor](https://discourse.slicer.org/u/AndFor)\
**Post date:** [November 3, 2017, 10:54pm UTC](https://discourse.slicer.org/t/how-to-smooth-a-volume-rendering/1370/1 "2017-11-03T22:54:22Z")

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Hello  
I’ve find some topics about Model surface smoothing, but nothing for smoothing a Volume in volume rendering  
Is possible?

 ![Screenshot](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/7/f/7f095a5a2691c15b7f6cec4fdcff0127dc9327b4.jpeg)

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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:** [November 3, 2017, 11:32pm UTC](https://discourse.slicer.org/t/how-to-smooth-a-volume-rendering/1370/2 "2017-11-03T23:32:45Z")

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You can achieve a lot by tuning volume rendering transfer functions, but if that’s not enough then you can apply noise reduction filters, such as Anisotropic diffusion or Gaussian smoothing modules, ITK image filters in SimpleFilters module, or filters in Anomalous filters extension ([http://slicer.kitware.com/midas3/slicerappstore/extension/view?extensionId=192777&layout=layout](http://slicer.kitware.com/midas3/slicerappstore/extension/view?extensionId=192777&layout=layout)). Optimal choice of filter and parameters depend on the characteristics of noise in the image.