title: How to "flatten" in Inkscape?
body: <p>I know that Inkscape has no flatten function. But. I have three objects in an svg file, which I want to all merge into one. It's a contribution to the Material Design Icon catalog, so this has to be a single path SVG.</p>
  
  <p>However, when I "Union" the objects, two of the inner objects become thinner. If I "Combine" them, the outer object becomes fatter. Think it may have something to do with stroke and fill, but tinkering with these doesn't change anything.</p>
  
  <p>Isn't there a function that just converts whatever is visible into one shape?</p>
  
  <p><a href="https://i.stack.imgur.com/wb1wJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wb1wJ.png" alt="enter image description here"></a></p>
  
  <p>Juancho suggested doing "Stroke to Path", this works in the sense that the dimensions are now kept the same. But I fail to get the background (fill?) back on the outer ring afterwards:</p>
  
  <p><a href="https://i.stack.imgur.com/DHkXE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DHkXE.png" alt="enter image description here"></a></p>
  
  <p>This is the raw SVG:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8" standalone="no"?&gt;
  &lt;svg
     xmlns:dc="http://purl.org/dc/elements/1.1/"
     xmlns:cc="http://creativecommons.org/ns#"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:svg="http://www.w3.org/2000/svg"
     xmlns="http://www.w3.org/2000/svg"
     xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
     xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
     version="1.1"
     width="24"
     height="24"
     viewBox="0 0 24 24"
     id="svg4"
     sodipodi:docname="pentagram-circle-outline.svg"
     inkscape:version="0.92.4 (5da689c313, 2019-01-14)"&gt;
    &lt;metadata
       id="metadata10"&gt;
      &lt;rdf:RDF&gt;
        &lt;cc:Work
           rdf:about=""&gt;
          &lt;dc:format&gt;image/svg+xml&lt;/dc:format&gt;
          &lt;dc:type
             rdf:resource="http://purl.org/dc/dcmitype/StillImage" /&gt;
          &lt;dc:title /&gt;
        &lt;/cc:Work&gt;
      &lt;/rdf:RDF&gt;
    &lt;/metadata&gt;
    &lt;defs
       id="defs8" /&gt;
    &lt;sodipodi:namedview
       pagecolor="#ffffff"
       bordercolor="#666666"
       borderopacity="1"
       objecttolerance="10"
       gridtolerance="10"
       guidetolerance="10"
       inkscape:pageopacity="0"
       inkscape:pageshadow="2"
       inkscape:window-width="1722"
       inkscape:window-height="999"
       id="namedview6"
       showgrid="false"
       inkscape:zoom="27.812867"
       inkscape:cx="12.701976"
       inkscape:cy="11.744741"
       inkscape:window-x="0"
       inkscape:window-y="0"
       inkscape:window-maximized="0"
       inkscape:current-layer="svg4" /&gt;
    &lt;path
       d="M 12 2 C 6.47 2 2 6.5 2 12 A 10 10 0 0 0 12 22 A 10 10 0 0 0 22 12 A 10 10 0 0 0 12 2 z M 12 4 A 8 8 0 0 1 19.722656 9.9179688 A 7.5696538 7.4413764 5.2319768 0 1 19.722656 9.9199219 A 7.5696538 7.4413764 5.2319768 0 1 20.044922 11.904297 A 7.5696538 7.4413764 5.2319768 0 1 19.140625 15.587891 A 8 8 0 0 1 12 20 A 8 8 0 0 1 4 12 A 8 8 0 0 1 12 4 z "
       id="path2"
       style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-opacity:1;stroke-width:0;stroke-miterlimit:4;stroke-dasharray:none" /&gt;
    &lt;path
       inkscape:connector-curvature="0"
       style="display:inline;fill:#030000;fill-opacity:1;fill-rule:nonzero;stroke:#000000;stroke-width:0.40000001;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
       d="M 12.091785,4.6840407 7.6392526,17.907485 12.129207,14.886198 16.54432,17.867474 Z m -0.03789,2.140559 3.126247,9.3421803 -3.107775,-2.180816 -3.1262453,2.180816 z"
       id="path4048"
       sodipodi:nodetypes="cccccccccc" /&gt;
    &lt;path
       inkscape:connector-curvature="0"
       style="display:inline;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:#000000;stroke-width:0.40000001;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
       d="m 4.8751298,9.9191537 6.5719872,4.4869193 h 1.36418 l 6.33373,-4.4296539 z M 7.2977352,10.665597 H 16.96068 l -4.906786,3.380383 z"
       id="path3166"
       sodipodi:nodetypes="ccccccccc" /&gt;
  &lt;/svg&gt;
  </code></pre>