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I have a problem rigging this cartoony character in Blender, particularly the mouth and eyes, and applying shape keys. model

I want create this shape for its big mouth:

mouth form

and the part of the eyelid that goes down

Please answer me in plain language, because Google Translate and my English is not very good.

Thanks

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Just an idea more than a real answer, but for that very special case, you should try something like that (sorry for the very quickly done rabbid..) : the trick is to have a ability to have very few points to animate and to be easily able to stay around the wanted shape.

enter image description here

As you can see, very few vertices :

enter image description here

But all rely on a capsule metaball that I have deformed a bit :

  • 1 : the capsule shown
  • 2 : the capsule drawn as bounding box only

enter image description here

Now the rabbid has some modifiers (from top to bottom) :

  • Subsurf : because we have few points to animate but want it to stretch smoothly
  • Shrinkwrap : the most important part here as this modifier allows to stay along the capsule (see below for more explanations)
  • Solidify : to give it some volume

enter image description here

For the capsule :

  • Add it : Shift+A then choose 'metaball' and 'capsule' (surely you can also make your own shape instead)
  • Give it more precision (picture below)
  • Then convert it to mesh, with Alt+C, then 'mesh from curve'

enter image description here

Now edit it a bit in order to give it the wanted shape (to say it quickly, larger on top, smaller at the base).

We want the rabbid head and face to follow the capsule shape, but not the ears or the eyes. So add a vertex group to the rabbid. Assign this group the head part only and name it 'capsule'. Then, set this vertex group in the shrinkwrap modifier as seen two images above.

enter image description here

Now create your shape keys as you need :

enter image description here

The same kind of thing could be used to allow the eyelids to follow the eyes.

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Creating these extreme facial expressions, I feel like creating a bone face rig is the best way to go. Check out this face rigging tutorial by David Ward alto it's pretty outdated, you should be able to use it! https://youtu.be/QO-Lo8hCry0

Looking at the mesh you got right now, I don't think you have enough geometry to stretch it like you want to... I hope a high level subsurf modifier does the trick tough!

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  • $\begingroup$ it solved . i have to use few vertices for shape key my 3d model $\endgroup$
    – mma78
    Jul 30 '16 at 10:19

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