Animating Geometry

I have a sphere with a hole in it that I created in Maya (2015). I want to animate the hole open and closed for Unity.

I initially animated the vertices within Maya and exported it but the animation didn’t show in Unity (I then had a Google and found that isn’t supported). I’ve read that IK Joints work but thats a bone system which seems a bit over the top for a hole.

Whats the best way to go about doing this?

The best way to do this would be to create a blend shape for the sphere in Maya that has the hole in it, and then use Unity to animate the blend shape value. There’s a section of the Unity manual that talks about using blend shapes in Unity in case it helps.