# visualization of STL surface orientation flipped between machines
**URL:** https://discourse.slicer.org/t/visualization-of-stl-surface-orientation-flipped-between-machines/24148
**Category:** Support
**Created:** [July 1, 2022, 7:25pm UTC](https://discourse.slicer.org/t/visualization-of-stl-surface-orientation-flipped-between-machines/24148 "2022-07-01T19:25:49Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ChantelC](https://discourse.slicer.org/u/ChantelC)
#### Post date: [July 1, 2022, 7:25pm UTC](https://discourse.slicer.org/t/visualization-of-stl-surface-orientation-flipped-between-machines/24148/1 "2022-07-01T19:25:49Z")
I am visualizing the output of the mri2mesh simnibs pipeline gray matter and white matter segmentation surfaces against the original mri in slicer on a mac server (mojave 10.14.6) and the .stl surfaces are flipped in orientation. I tried the latest version of slicer as well as 4.13.0 and they were flipped on both. However, when I visualize the same surfaces on my laptop (Monterey 12.2.1) in slicer the orientation is correct. Any ideas on how to fix this?
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### Author:  [@pieper](https://discourse.slicer.org/u/pieper)
#### Post date: [July 1, 2022, 7:40pm UTC](https://discourse.slicer.org/t/visualization-of-stl-surface-orientation-flipped-between-machines/24148/2 "2022-07-01T19:40:18Z")
Probably you have different slicer versions. Check this information for guidance:
> [@Exported STL files dont match view in Slicer](https://discourse.slicer.org/t/exported-stl-files-dont-match-view-in-slicer/16441/2):
>
> Slicer now reads all files in LPS coordinate system. Before Slicer-4.11, it expected STL files to be in RAS coordinate system by default. See more information about how to avoid RAS/LPS mismatch in the [migration guide](https://www.slicer.org/wiki/Documentation/Nightly/Developers/Tutorials/MigrationGuide/Slicer#Slicer_5.0:_Models_are_saved_in_LPS_coordinate_system_by_default). If there is no LPS/RAS issue but slight position and/or orientation differences then most likely that other software does not properly take into account image origin, spacing, or axis directions of the input volume.
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### Author:  [@ChantelC](https://discourse.slicer.org/u/ChantelC)
#### Post date: [July 1, 2022, 8:17pm UTC](https://discourse.slicer.org/t/visualization-of-stl-surface-orientation-flipped-between-machines/24148/3 "2022-07-01T20:17:35Z")
Great, this has solved the issue. Thank you very much.