.SMG File

The smg file extension is nowadays best known to be associated with the 3DVIA, an integrated content development software for Microsoft Windows operating system developed by Dassault Systèmes S.A.

It appears that smg file stores 3D model for 3DVia Composer.

Files with smg file extension can be usually encountered as 3D models saved in special 3DVIA format from Dassault Systemes.

How to open:

You can use the 3DVIA player to view *.smg models in any web browser.

How to convert:

Perhaps some sort of conversion to some 3D model exchange format is possible.