IK foot twisting issue

[Joel_Brown]

Hi there,

I’m having issues with my IKs in the foot of a character I’ve been working on.

Whenever I rotate the foot on the Z axis the foot twists. The Y is a bit off as well but it is at least more or less in the right direction.

Hopefully this second screencap gives an idea of how I’ve set it up.
It mostly follows the “Rigging a Leg” tutorial on http://blendtuts.com/leg_rig

In the quite likely event that I have been unclear… I’m sure I can elaborate on specifical unclear points.

Cheers
Joel

[ridix]

Look at tutorial around 20:40, he talks about foot rotation on Z axis and how rig gets affected. Make sure you have your rig set up like he has there.

[Joel_Brown]

Thanks for that. I added the pole targets like he did and all works at it should now.

[norvman]

One way to keep bones from twisting in odd directions is to keep the bones in a particular chain all axis aligned…
all with the Z- axis up… or all with the Xaxis down… etc…
an easy way to keep track of which direction those Pesky bone Axis are pointing is to turn on the ‘bone axis’ display…

Select your bone > Properties Panel > Armature (the little man Icon) > Display > check the box that says “Axes”…
now your bones all display axis arrows that let you know exactly the alignment of each bone’s Axis…

the important thing… is keeping each bone aligned with it’s parent as close as possible…