visualization of STL surface orientation flipped between machines

[ChantelC (Chantel Charlebois)]

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?

[pieper (Steve Pieper (Isomics, Inc.))]

Probably you have different slicer versions. Check this information for guidance:

Exported STL files dont match view in Slicer

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. 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.

[ChantelC (Chantel Charlebois)]

Great, this has solved the issue. Thank you very much.