• Unity
  • IK in unity3d

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Hello! We didn't make that so we can't provide any information on support on it. (I mean, I certainly haven't tried it.)

You should contact its developer. They seem to have an email address on that page.

yep. thanxx.
they are ..

Hi, ya it's not support full support ik(ik just export skeleton and first frame), actually we think you can fast create animation with skeleton via photoshop and some extra tool

If you use the Official Spine-Unity Runtime instead of that Unity Asset Store asset, IK works just fine.
But all the interface and Transform behaviors will be different from how that asset behaves.