I have this bone series

enter image description here

and as you can see, the bone is bending nicely. however, i wanted a pole target, so i added one in front of the knee.

heres what happens now:

enter image description here enter image description here

its not bending, any help is appreciated!

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    $\begingroup$ I had the same problem. You need to have some small angle of rotation in the leg bones. The IK solver fails when the bones are completely straight. $\endgroup$ – user22105 Feb 22 '16 at 18:28

Make sure your knee joint is not straight like this. enter image description here

Instead, make it bent a little and all will be well. Just like in the image below. enter image description here

| improve this answer | |
  • 1
    $\begingroup$ Would be good if you could add why the pole needs this to work correctly. $\endgroup$ – Ray Mairlot Dec 6 '17 at 11:50

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