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I put a lattice around my sphere per basic deform set up:

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Instead of modifying the sphere from the inside, I want the inverse effect. I want the sphere to squash like a ball when it interactions with it.

before I parent

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This works. Now here is the advance set up where I'm stuck. I want 2 balls that are part of the same object to interact with each other, using the lattice modifier, they would squash equally from both sides.

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I had to modify this in edit mode because if I can get a photo, than I wouldn't need to ask this question :)

I got stuck as soon as I tried to bind the 2 balls into a lattice. They deform immediately which is not what I want.

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After I parent

I'm assuming this can probably be done easily if I make the balls 2 separate objects. But that's the challenge here - I don't want to. Is what I'm asking for possible with a single object?

Edit: They will be animated to squash with bones.

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  • $\begingroup$ More lattice divisions maybe? $\endgroup$
    – HISEROD
    Commented Jan 4, 2021 at 0:49

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I'm not sure why you need to keep your 2 balls within one object, but you could try it with Lattice or with Mesh Deform or even with shapekeys.

If you want to do it with Lattice, scale the lattice it in Object mode (not Edit mode) so that it contains your 2 ball object, in the Properties panel > Object Data > Lattice, give it enough Resolution (i.e. subdivisions):

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Now create a basic shapekey, then another one:

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In Edit mode, squish your lattice the way you want:

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Back to Object mode, keyframe the shapekey value to animate:

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Here is what it could give:

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  • $\begingroup$ Let's say I want to make breast. :) $\endgroup$
    – Jimmy Lin
    Commented Jan 4, 2021 at 14:41
  • $\begingroup$ have you looked into shapekeys? Maybe it will make it easier $\endgroup$
    – moonboots
    Commented Jan 4, 2021 at 14:43
  • $\begingroup$ Yes, I'm good with shape keys. It just want better way to uniformly deform a mesh before applying it a a shape key. Say i have 2 breast obviously, it's going to be in the same mesh. But even in a static position, they'll be squashed together. I try to use lattice deformer to do this. Now I'm having issues because Lattice deforms whole mesh. I just want the area that is inside the lattice to deform. $\endgroup$
    – Jimmy Lin
    Commented Jan 4, 2021 at 15:10
  • $\begingroup$ You can assign the breasts to an vertex group and select this group in the Lattice modifier so that only these vertices will be affected, you can do the same with a Mesh Deform modifier $\endgroup$
    – moonboots
    Commented Jan 4, 2021 at 15:16
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    $\begingroup$ it's the woman's body ^^ $\endgroup$
    – moonboots
    Commented Jan 4, 2021 at 21:15

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