2
$\begingroup$

I ran into a weird bug where my 3-bone IK chain isn't behaving as expected. I've made other quadrupeds in the past and had no problem like this. As far as I can tell, the IK constraint is also exactly the same as all others I've made. Here are some GIF examples.

This is what I would expect from a good 3-bone IK leg: https://gyazo.com/98754f4cdb2f08d87d9ce5734c5b367e

This is what I'm getting now, the upper bones are barely rotating: https://gyazo.com/0ea27bb19a79a998cf1cfe44400b36c5

$\endgroup$
  • $\begingroup$ Did you check the stiffness values of every bone of the chain in the Inverse Kinematics tab of the armature properties panel? $\endgroup$ – josh sanfelici Oct 3 at 17:31
2
$\begingroup$

As it turns out, the severity of the rotation in the chain directly effects how well the IK will work. A subtle rotation isn't enough, but as soon as I bend the chain a bit more in edit mode, the IK picks up quite a bit of rotation.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.