So I have this pencil case:

blender pencil case

And I would like to open it like this:

opened real life pencil case

Note : I'm not trying to open the zipper, just to deform the pencil case in a realistic way. I figured the best way to do this would be by rigging it, but the thing is, I don't know much about rigging. I tried this :

useless test rig

But, as you might have noticed, I kind of have no idea what I'm doing and it really does not work.

So, would you have an idea of how to get a realistic opened pencil case, with or without rigging ? That would really help me !

  • 1
    $\begingroup$ Look for videos on how to use weight painting to control the influence of bones on the object. $\endgroup$
    – susu
    Commented Jan 2, 2021 at 21:23
  • 1
    $\begingroup$ Hook modifiers are an option as well. $\endgroup$
    Commented Jan 3, 2021 at 1:45

1 Answer 1


Maybe you should try to rig with the Stretch To constraint, I give here an explanation for an arm (method #2), it's exactly the same for your pen case, except you'll need several bones all around the object. Also you may want more than 2 segments if the deformation is more complicated:

enter image description here

You may also want to try Spline IK but it's a bit tedious, so if Stretch To works fine, then use it.


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