# Non-linear transformation is ignored in volume rendering

**URL:** <https://discourse.slicer.org/t/non-linear-transformation-is-ignored-in-volume-rendering/28082>\
**Category:** Feature requests\
**Created:** [February 28, 2023, 2:01am UTC](https://discourse.slicer.org/t/non-linear-transformation-is-ignored-in-volume-rendering/28082 "2023-02-28T02:01:24Z")\
**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:** [February 28, 2023, 2:01am UTC](https://discourse.slicer.org/t/non-linear-transformation-is-ignored-in-volume-rendering/28082/1 "2023-02-28T02:01:24Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/1/c115bad67339dcb0f8d98e37628415bbf2d38824.jpeg)  
the picture above shows the volume rendering and thresholding result in 3d window and 2d windows,in 2d windows the thresholding match the volume data , but in 3d window,they has a long distance,i don’t know that wrong with the dicom serial

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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:** [February 28, 2023, 2:05am UTC](https://discourse.slicer.org/t/non-linear-transformation-is-ignored-in-volume-rendering/28082/2 "2023-02-28T02:05:17Z")

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Please double check that the volume rendering DICOM series is the same as the one as you have segmented. DICOMs may have contain multiple series.

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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:** [February 28, 2023, 2:09am UTC](https://discourse.slicer.org/t/non-linear-transformation-is-ignored-in-volume-rendering/28082/3 "2023-02-28T02:09:39Z")

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thank you muratmaga very much  
i found the ct serial i read from DICOM module has a initial transform

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/b/ab771c595d7de924a038e5a1a88b795773f4e842.png)  
the problem fixed when i delete the transform node