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    <title>tema Can't intersect, subtract or union 2 solids en AutoCAD Forum</title>
    <link>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8559349#M966069</link>
    <description>&lt;P&gt;Hello, I need help from an experienced user - I have 2 solids made by extrusion but I cannot intersect, subtract or union them for some reason.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;I can't quite understand what's wrong and don't know where to look for a fix. Something is definitely wrong here. Please help, I've attached a file.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;UPD: it has something to do with REGION extrusion. The solid with bump on top was created with spline and converted to region, then extruded. This solid is causing the unexpected behavior, could you please suggest - how to "normalize" it?&lt;/P&gt;</description>
    <pubDate>Tue, 29 Jan 2019 20:51:37 GMT</pubDate>
    <dc:creator>Anonymous</dc:creator>
    <dc:date>2019-01-29T20:51:37Z</dc:date>
    <item>
      <title>Can't intersect, subtract or union 2 solids</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8559349#M966069</link>
      <description>&lt;P&gt;Hello, I need help from an experienced user - I have 2 solids made by extrusion but I cannot intersect, subtract or union them for some reason.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;I can't quite understand what's wrong and don't know where to look for a fix. Something is definitely wrong here. Please help, I've attached a file.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;UPD: it has something to do with REGION extrusion. The solid with bump on top was created with spline and converted to region, then extruded. This solid is causing the unexpected behavior, could you please suggest - how to "normalize" it?&lt;/P&gt;</description>
      <pubDate>Tue, 29 Jan 2019 20:51:37 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8559349#M966069</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2019-01-29T20:51:37Z</dc:date>
    </item>
    <item>
      <title>Re: Can't intersect, subtract or union 2 solids</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8561847#M966183</link>
      <description>&lt;P&gt;Hello&amp;nbsp;@Anonymous&lt;/a&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;When using Intersect for example the objects need to overlap. The Intersect tool worked fine on these objects. I recommend reviewing some videos on &lt;A href="https://www.lynda.com/AutoCAD-tutorials/AutoCAD-3D-Architectural-Modeling/761939-2.html?srchtrk=index%3a1%0alinktypeid%3a2%0aq%3aautocad+3d+modeling+%0apage%3a1%0as%3arelevance%0asa%3atrue%0aproducttypeid%3a2" target="_blank" rel="noopener"&gt;how to design with AutoCAD 3d tools.&amp;nbsp;&lt;/A&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Please&lt;STRONG&gt;&amp;nbsp;&lt;SPAN style="color: #008000;"&gt;"Accept Solution"&lt;/SPAN&gt;&lt;/STRONG&gt;&amp;nbsp;if a reply or replies have helped resolve the issue or answered&amp;nbsp;your question, to help others in the community.&lt;/P&gt;</description>
      <pubDate>Wed, 30 Jan 2019 18:33:24 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8561847#M966183</guid>
      <dc:creator>natasha.l</dc:creator>
      <dc:date>2019-01-30T18:33:24Z</dc:date>
    </item>
    <item>
      <title>Re: Can't intersect, subtract or union 2 solids</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8562073#M966208</link>
      <description>&lt;P&gt;scale the piece on layer 2 from the center point of one end&amp;nbsp; by .999 or .9999 and it subtracts.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;surfaces identical don't subtract well?&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Wed, 30 Jan 2019 19:38:46 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8562073#M966208</guid>
      <dc:creator>parkr4st</dc:creator>
      <dc:date>2019-01-30T19:38:46Z</dc:date>
    </item>
    <item>
      <title>Re: Can't intersect, subtract or union 2 solids</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8564581#M966374</link>
      <description>&lt;P&gt;Hello&amp;nbsp;&lt;a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/59562"&gt;@parkr4st&lt;/a&gt;,&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Yes, the objects have to differ in scale &amp;amp; volume. It is best to make one object larger then the other.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Usually when you receive 3d tool errors it b/c there is something wrong with the objects.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Please&lt;STRONG&gt;&amp;nbsp;&lt;SPAN style="color: #008000;"&gt;"Accept Solution"&lt;/SPAN&gt;&lt;/STRONG&gt;&amp;nbsp;if a reply or replies have helped resolve the issue or answered&amp;nbsp;your question, to help others in the community.&lt;/P&gt;</description>
      <pubDate>Thu, 31 Jan 2019 17:28:49 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8564581#M966374</guid>
      <dc:creator>natasha.l</dc:creator>
      <dc:date>2019-01-31T17:28:49Z</dc:date>
    </item>
    <item>
      <title>Re: Can't intersect, subtract or union 2 solids</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8570846#M966694</link>
      <description>&lt;P&gt;Thank you for the answer. As far as I understood - if multiple surfaces of 3d objects have same coordinates the program sees them as one (probably to reduce redundancy for calculations). However there is a fine trick to overcome this. One can reduce number of "same" surfaces, I think it must be 3 or less and still complete desired action.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;In any case - I redesigned my approach for such 3d solids in such a way that they still don't overlap but retain the necessary shape.&lt;/P&gt;</description>
      <pubDate>Mon, 04 Feb 2019 10:56:46 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/can-t-intersect-subtract-or-union-2-solids/m-p/8570846#M966694</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2019-02-04T10:56:46Z</dc:date>
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