# Linear transform not appearing anymore as a driver in IGT Volume Reslicer Driver

**URL:** <https://discourse.slicer.org/t/linear-transform-not-appearing-anymore-as-a-driver-in-igt-volume-reslicer-driver/45497>\
**Category:** Support\
**Tags:** slicerigt\
**Created:** [December 15, 2025, 5:45pm UTC](https://discourse.slicer.org/t/linear-transform-not-appearing-anymore-as-a-driver-in-igt-volume-reslicer-driver/45497 "2025-12-15T17:45:32Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![spichardo](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/spichardo/32/15092_2.png) [@spichardo](https://discourse.slicer.org/u/spichardo)\
**Post date:** [December 15, 2025, 5:45pm UTC](https://discourse.slicer.org/t/linear-transform-not-appearing-anymore-as-a-driver-in-igt-volume-reslicer-driver/45497/1 "2025-12-15T17:45:32Z")

</div>

Hi,

I got this new issue in r5.10.0 of 3DSlicer and SlicerIGT (Revision: [71e2153](https://github.com/SlicerIGT/SlicerIGT/commit/71e2153)).

I create a new linear transformation to be used in the IGT Volume Reslicer Driver, but the linear transform does not appear in the list of drivers. See screenshot

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/2/52a3b9ea24ac054521c8cf2e57e83d9282193d34.png)

If I do this in r5.8.1, the linear transform appears as expected:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/1/819d2c1db9f2811b521ea4121b660c8ff1d5a12f.png)

If I save the scene in r5.8.1 and then I load it in r5.10.0, the Volume Reslicer Driver shows the linear transform in the list of drivers.

I noticed the Linear Transform widget changed a little compared to r5.8.1. So not sure if I’m missing to do something extra. Overall, the linear transformation seems to be working as expected if, for example, applied to a 3D model such as the IGT’s Needle model.

Tested in MacOS 15.7.2, iMacPro 2017 Intel x64.

Is this a bug that is preventing to show the linear transform in the Volume Reslicer Driver? Or do I need to do something else in r.5.10.0 of 3DSlicer to make a new linear transform to appear in the list of drivers?

Thanks for any help,

Sam

---

<div class="post-metadata">

**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:** [December 16, 2025, 5:35am UTC](https://discourse.slicer.org/t/linear-transform-not-appearing-anymore-as-a-driver-in-igt-volume-reslicer-driver/45497/2 "2025-12-16T05:35:57Z")

</div>

Good point. The Transforms module was updated to create `vtkMRMLTransformNode` on right-click, which node selectors in several SlicerIGT modules did not accept. I’ve updated SlicerIGT now to no longer user `vtkMRMLLinearTransformNode` anymore, which should fix the issue.