Blender v2.79.

Let's say I have to extrude all faces of this planar construction containing two edges not included in faces, and one isolated vertex:

enter image description here

In this object, there are not hidden vertices, edges or faces:

enter image description here

If I select all faces in Face-Select mode, the result (after extrusion of the selection) is this one:

enter image description here

The orphan edges have been selected, which isn't what I expected since it is not possible to select the edges manually (e.g. by using Border-Select) in this mode. Looks like a bug to me.

But if I select all edges in Edge-Select mode, then switch to Face-Select mode, the result is this one:

enter image description here

The edges are not kept selected. This behavior seems compliant to the documentation about Select modes:

When switching modes in an “ascendant” way [...] the selected parts will still be selected if they form a complete element in the new mode.

Another strange result: Select All in Vertex-Select mode, switch to Face-Select and back to Vertex-Select:

enter image description here

Only one edge is kept selected as well as the isolated vertex. Seems completely buggy.

Anybody with a clear view of this? What is the correct way to select all complete faces for the extrusion?

  • 1
    $\begingroup$ There is probably a zero sized face there with overlapping vertex. Try removing doubles $\endgroup$ Jun 24 '18 at 15:37
  • $\begingroup$ @DuarteFarrajotaRamos: I've updated the question, adding the number of faces reported by Blender. Nothing is hidden or co-located (the object is a plane where some faces and edges have been removed). $\endgroup$
    – mins
    Jun 24 '18 at 17:15
  • $\begingroup$ Do you have a file to take a look at? As it stands, I would say select one element, no matter whether it is a Vert, Edge or Face and Select Linked by pressing L with your mouse over your target or Ctrl + L if you are elsewhere. $\endgroup$
    – Ben
    Feb 5 '19 at 13:45

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