I got a doubt on what is the best method for me to select the left part of this mesh to divide this into two since this is a half-circle mesh. I am looking at the options and cannot believe this has to be done point by point to then cut the object into two. The reason for this is that I have two different textures to apply, one on the interior part of this "arch" and another on the outside. Like you can see I didn't do it right this time and some got selected on the other side

enter image description here

How can I in a fast way select the left part divide it and close it and then the right and do the same process?

Thanks Ilda


1 Answer 1


If you have suitable topology, and can Alt - select an edge-loop, then one of the many selection options open to you is:

Header Menu > Select > Select Loops > Select Loop Inner-Region...

enter image description here

.. and you can decide which side is inner, and which is outer, if they're both the same size.

  • $\begingroup$ Very elegant. Now I want to know how Blender decides which side is bigger or inner on a cube :)) $\endgroup$ Nov 30, 2021 at 21:12
  • $\begingroup$ This is perhaps dumb question, how do I close the inner and the outer parts since they are hollow? $\endgroup$ Nov 30, 2021 at 22:18
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    $\begingroup$ @JachymMichal Since I am very lazy, and there are only two choices, I haven't given that one a lot of thought :) Leave it to the theorists.. $\endgroup$ Nov 30, 2021 at 22:50
  • $\begingroup$ @RobinBetts The technique you've shown was spot on! I am just starting out and I can wait for tomorrow for sure :) $\endgroup$ Dec 1, 2021 at 1:51
  • $\begingroup$ @IldaLontaria Believe it or not, the 'dumb' question has options. 1. Do you need to expose the internal faces? (Not necessary, just to give the outside different textures). 2 If so, do you want the seam between the 2 halves to show, or to magically disappear when they are joined, as shown here? $\endgroup$ Dec 1, 2021 at 9:22

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