I'm planning an animation, and one of the creatures is going to basically have a mouth. It'll be roughly spherical, but... unlike most of the ones you are thinking of, I want the opening to 'bend open' the sphere.

Okay, I'm not sure that's how I'd describe it, but... think Pac-man, then think THIS:Chuxtoepose_The_Magnificent

That 'thing/eldritch horror' is known as Chuxtoepose. It's from this game and I want to make that magnificent jaw by cutting into a UV Sphere. Is this doable, and how?

Thanks, Nefer

  • $\begingroup$ cutting open the sphere is going to be the easy part. Decide which ring you want to base the mouth at, select the desired vertices, and rip the edges. The other parts, how to deal with the teeth, and animating the bits after ripping are going to be the challenge, it seems to me. $\endgroup$
    – brasshat
    Jun 23, 2015 at 20:53
  • $\begingroup$ Ah, thank you. Rip the edges... what exactly do you mean by that? $\endgroup$
    – Nefer007
    Jun 23, 2015 at 22:52
  • $\begingroup$ {select them in edit mode and hit [v]} $\endgroup$
    – ruckus
    Jun 23, 2015 at 23:39
  • $\begingroup$ I think the title is a bit off. Could you please find a better one? $\endgroup$
    – p2or
    Jun 24, 2015 at 8:01
  • $\begingroup$ @poor: I actually changed the title twice. First it was Creating a Mouth from a Sphere, then Making a Mouth out of a Sphere, and then I simplified it. But it's closed anyways. $\endgroup$
    – Nefer007
    Jun 24, 2015 at 17:37

2 Answers 2


On your UV sphere in edit mode, select the segments on the ring that you want as the location of your mouth, thus:


then press the V key, which creates a new set of vertices, like this:


You can also do it manually, but deleting an edge perpendicular to the ring at which you want to locate your mouth, duplicating the vertex on the "mouth" end of the deleted edge, and connecting the duplicated vertex to the vertices in the ring above.


Create a sphere, move the pivot point to the point where you want the mouth to open.

enter image description here

Duplicate. On one sphere delete the top half. On the other delete the lower half.

enter image description here Animate both objects by rotating them in opposite directions.

enter image description here

Optionally create a cycle by extrapolating the keyframes in the curve editor (Channel->Extrapolate->Make cyclic).

Add an empty and parent both hemispheres to it.

To move the object just move the empty.

enter image description here

enter image description here

  • $\begingroup$ I like your little gif animation :) $\endgroup$ Jun 24, 2015 at 7:52

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