title: Add 3D model to PowerPoint presentation programmatically
body: <p>Since <strong>windows 10 Fall Creator</strong> update you can add <em>3D models</em> directly into <strong>PowerPoint</strong> presentations.</p>
  <p>I have been using <strong>OpenXML</strong> to create <strong>PowerPoint</strong> documents programmatically, however I couldn't find a way to add a <em>3D model</em> to a <strong>PowerPoint</strong> document. Anyone knows how to achieve that?</p>
  <p>As Steve suggested in the comments I have created an empty pptx file with only a 3D model and unzip it to see the content.</p>
  <p>In the content there is a subfolder called media which the 3D content is located with the name &quot;model3d1.glb&quot;.
  However the 3D content is automatically converted from the format that I have used (.3mf) to (.glb). It seems that powerpoint automatically converts all the supported formats to <code>GL Transmission Format</code>.</p>
  <p>My question: Is it possible to avoid the conversion?</p>