I have been having a problem with "can not operate boolean operation" to unite 2 objects. One is definitely mesh and other one, I thought it was mesh but it has a different icon next to it. I did roll over it but it did not tell me what it meant. I suspect this needs to be converted to a proper mesh to boolean.

It is the icon in the outliner panel immediately to the left of the stem final copy and stem_final objects. It is a file imported from sketch up, with the file format "dae". I also converted this file in another software "mesh lab" obj file, ply file, neither worked. One file imported from mesh lab in the form of dae worked as mesh, so I am not sure what is going on...

enter image description here

When I try to find out if the object is non-manifold with Ctrl+Shift+Alt+M, all the lines light up in orange…


If you examine the "add objects" menu, visible by using the SHIFT-Akey combination, or the Spacebar > Akey sequence, you will see that the icon to the left of "stem final copy", and "stem_final" in the excerpt of the image of the outliner panel you link to is used for one of three object types: an empty object, a force field, and a group instance. None of the three is a mesh, and so cannot be part of a boolean operation, as these take two mesh data.

You can create something equivalent to an empty by adding a mesh object, and in edit mode selecting and then deleting all of its vertices, but I don't see in the Blender Manual any information on converting an empty, force field, or group instance to a mesh.

  • $\begingroup$ Thank you so much! I think I understand. Why do you think this happened to my file? Some were blender mesh to start with but I used sketch up and mesh lab to edit little bit. then, I imported as dae, ply and obj file. $\endgroup$
    – junkyubin
    Jul 28 '14 at 15:46
  • 1
    $\begingroup$ Note that if you have a mesh parented to an empty, the empty will be highlighted when you select the child mesh. You will have to click the + next to the empty icon to show the child objects. $\endgroup$
    – gandalf3
    Jul 28 '14 at 19:28

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.