# \[OpenVR\] Set scale or motion factor from UI crashes

**URL:** https://discourse.vtk.org/t/openvr-set-scale-or-motion-factor-from-ui-crashes/10474
**Category:** VR/AR
**Created:** [January 16, 2023, 9:30pm UTC](https://discourse.vtk.org/t/openvr-set-scale-or-motion-factor-from-ui-crashes/10474 "2023-01-16T21:30:31Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![banesullivan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/banesullivan/32/7143_2.png) [@banesullivan](https://discourse.vtk.org/u/banesullivan)
#### Post date: [January 16, 2023, 9:30pm UTC](https://discourse.vtk.org/t/openvr-set-scale-or-motion-factor-from-ui-crashes/10474/1 "2023-01-16T21:30:31Z")

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If I try to use the UI to change the Scale Factor or Motion Factor, the VR app crashes without any error messages… I’ve also tried programmatically calling `SetPhysicalScale()`, but that has seemingly no affect.

Any tips on how to properly set the scale and motion factors in VR?

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### Author: ![mwestphal](https://discourse.vtk.org/user_avatar/discourse.vtk.org/mwestphal/32/19_2.png) [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [January 17, 2023, 8:33am UTC](https://discourse.vtk.org/t/openvr-set-scale-or-motion-factor-from-ui-crashes/10474/2 "2023-01-17T08:33:39Z")

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I’d say take a look at ParaView XRInterface plugin, the feature works great there.

FYI @Thomas_Galland @Tiffany_Chhim