# Exported STL files dont match view in Slicer

**URL:** https://discourse.slicer.org/t/exported-stl-files-dont-match-view-in-slicer/16441
**Category:** Support
**Created:** [March 8, 2021, 11:19pm UTC](https://discourse.slicer.org/t/exported-stl-files-dont-match-view-in-slicer/16441 "2021-03-08T23:19:57Z")
**Posts on this page:** 1
**Showing post:** 2

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### 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: [March 8, 2021, 11:24pm UTC](https://discourse.slicer.org/t/exported-stl-files-dont-match-view-in-slicer/16441/2 "2021-03-08T23:24:45Z")

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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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_[View the full topic](https://discourse.slicer.org/t/exported-stl-files-dont-match-view-in-slicer/16441)._