Issue:

When opening a scene created in a legacy version of Maya within a more current version of Maya, the UV’s are broken.

Causes:

The algorithms in newer versions of Maya have been optimized and changed.

All UV’s with history originating from older versions of Maya will be imported incorrectly into newer versions.

Solution:

To avoid this issue, follow the steps below:

  1. Open the files in a previous version (Maya 2015 or older) 
  2. Delete non-deformer history on the objects
    1. Select the Object(s)
    2. Navigate to Edit > Delete By Type > History > Non-Deformer History
  3. Re-save the file

Opening the saved file with no history omits the new UV’s from the algorithm.

See also:

Source: https://autode.sk/2vd7Ks7

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