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    <p>Hi Matthew,</p>
    <p>For drawing speed, ChimeraX puts all of the nucleotide depictions
      into huge set of triangles per-model.  It would be fairly easy to
      add a XML comment or X3D metadata that listed which triangles
      correspond to which set of atoms.  Would that work for you?  With
      that information, you could write a program to split the huge
      triangle list into multiple X3D objects and label them
      appropriately.  And then import the post-processed X3D file into
      Blender.</p>
    <p>Can Blender select by color?  If so, you could uniquely color the
      nucleotides by type in ChimeraX, and select them that way in
      Blender for post-processing.<br>
    </p>
    <p>I've added an enhancement ticket for having separate X3D objects
      per-nucleotide, so you'll be notified if it is implemented. 
      Unfortunately, that is not a short term solution.<br>
    </p>
    <p>    -- Greg<br>
    </p>
    <div class="moz-cite-prefix">On 4/13/2021 7:50 AM, AQUILINA Matthew
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:D14CD5A8-1532-41B2-A624-968F51E1B693@ed.ac.uk">
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        Dear ChimeraX users,</div>
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        I’ve recently started using ChimeraX to produce rendered 3D
        models of DNA nanostructures.  I do this through the following
        process:</div>
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        <br class="">
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        <ul class="MailOutline">
          <li class="">Prepare nanostructure as a PDB file.</li>
          <li class="">Import this into ChimeraX.</li>
          <li class="">Arrange visualization settings such as nucleotide
            representation shape, width etc.</li>
          <li class="">Export .x3d file into Blender for downstream
            processing.</li>
        </ul>
        <div class=""><br class="">
        </div>
        <div class="">However, there is one issue - the 3D models
          exported by ChimeraX aren’t grouped into individual objects
          per nucleotide, so I am not able to easily select nucleotides
          and colour them in according to their type (A, T, G or C).
           With the older version of Chimera, these nucleotides are
          exported as individual objects, but then are given identical
          names with randomized IDs.  This means that setting the
          nucleotide types is a long manual process of clicking on each
          resulting nucleotide and naming them individually.</div>
        <div class=""><br class="">
        </div>
        <div class="">Does anyone know of a way to export a 3D model of
          a DNA structure which also exports the IDs of each nucleotide?
           This would greatly speed up the process for me to produce and
          render a DNA structure.</div>
        <div class=""><br class="">
        </div>
        <div class="">Many thanks for your help!</div>
      </div>
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        Best wishes,</div>
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        Matthew Aquilina<br class="">
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                        <b class=""><span style="color: rgb(0, 70, 49);"
                            class="">Matthew Aquilina</span></b></div>
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                        <b class=""><span style="color: rgb(0, 70, 49);"
                            class="">Precision Medicine PhD Student</span></b></div>
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                        College of Medicine and Veterinary Medicine
                        & School of Engineering | University of
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