title: Delete Internal Faces in MeshLab, NOT All Internal Structure
body: <p>I have an stl file which is composed of contiguous cubes, like this:</p>
  
  <p><img src="https://i.stack.imgur.com/wbhrK.png" alt="http://www.mathworks.com.au/matlabcentral/fileexchange/screenshots/6499/original.jpg"></p>
  
  <p>I need to remove all the shared faces of the cubes, so the structure become one continuous solid.</p>
  
  <p><strong>Note</strong> that I cannot just delete ALL the internal structure. The object is hollow and its internal structure must be maintained. I just want to delete the shared faces of the adjacent cubes.</p>
  
  <p>Is there a way to do that in MeshLab? Thanks,</p>