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I have an insetted cube like this:

enter image description here

Their normals are quite, normal:

enter image description here

But after I "Extrude along Individual Normals", the faces change in direction:

enter image description here

How do I extrude them like this:

enter image description here

?

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  • $\begingroup$ Use the S key (even thickness) while extruding. $\endgroup$ – lemon Mar 23 at 14:25
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Just check Offset Even in the pop-up menu.

enter image description here

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  • $\begingroup$ It works! But I wonder why it changes normal directions by default? I looked up the docs but only thing I found was docs.blender.org/manual/en/latest/modeling/meshes/editing/… and it states "This tool moved selected vertices/edges/faces along their own normal (perpendicular to the face)". $\endgroup$ – Lai Yu-Hsuan Mar 23 at 14:36
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    $\begingroup$ @LaiYu-Hsuan Your OP shows Face Normals. The tool actually uses Vertex Normals, which is actually what you want, for direction, but you also sometimes want the length of the extrusion to vary from vertex to vertex, to keep the new faces parallel to the old ones. That's what 'Offset Even' calculates. $\endgroup$ – Robin Betts Mar 23 at 16:50
  • $\begingroup$ Ok, now I got it. Thank you very much! $\endgroup$ – Lai Yu-Hsuan Mar 23 at 17:02

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