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Yes, this can be done by 'gmsh' command from the terminer. typically you have to run gmsh by :
<span style="color: rgb(200, 38, 19);">gmsh filename.geo -  </span><span style="color: rgb(0, 0, 0);">‚Äč('-' will invoke the command mode operation). Now you filename.geo script should contain necessary lines for the desired performance. For example, if you
 want to construct 3D mesh, corresponding line is Mesh 3. Similarly you can export files by putting 'export' command in the script. The lists are given in the manual. </span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> gmsh <gmsh-bounces@ace20.montefiore.ulg.ac.be> on behalf of Zuheyr Alsalihi <alsalihi@vki.ac.be><br>
<b>Sent:</b> Tuesday, August 25, 2020 2:03 PM<br>
<b>To:</b> gmsh@onelab.info <gmsh@onelab.info><br>
<b>Subject:</b> [Gmsh] Step model view export as png from command line/script</font>
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<pre>Dear Gmsh creators,
<i> 
</i>Forever grateful for providing us with this fabulous tools and all your effort in support.

I am working with gmsh without user interface in an optimization process where everything is driven with command line gmsh options in shell scripts.

I just want to load the step files, export the resulting view, what I would have seen if I were working with gmsh with display, to png file, and that is it.

Can I do that? 
 
Thank you very much for reading.
Best regards.
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