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Poser - OFFICIAL F.A.Q (Last Updated: 2024 Dec 13 7:48 am)

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Subject: Why does IK keep moving my hands?

WarKirby opened this issue on Mar 19, 2009 · 5 posts
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WarKirby ( ) posted Thu, 19 March 2009 at 3:16 AM · edited Thu, 12 December 2024 at 11:36 PM

A very simple question.

If I enable IK on a hand joint, nothing immediately happens. but when I turn it off again, that hand rotates to an odd bent forward angle. ctrl+z doesn't even undo this. And it affects EVERY FRAME IN THE ANIMATION

I want to use IK for tweaking poses in one frame, and then I have to go back and fix the hand poses in every single other keyframe. It's getting ridiculous.

Why is this happening? Can I prevent it ?

pjz99 ( ) posted Thu, 19 March 2009 at 4:38 AM

does this happen with all figures? I use IK frequently just how you're describling it, with SP3/M3/V3/V4/M4 and a few custom figures, and it might twitch a bit but it doesn't move more than a degree or two, for me.

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WarKirby ( ) posted Thu, 19 March 2009 at 4:41 AM

The figure I'm using is the Second Life avatar. I'm afraid I don't know enough to understand why the figure might be causing it.

pjz99 ( ) posted Thu, 19 March 2009 at 5:12 AM

For one thing, if the figure's bone's are scaled, then IK can behave pretty oddly.  Try it with one of the figures that Poser comes with (whatever version you have) and see if it behaves the same.

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ockham ( ) posted Thu, 19 March 2009 at 12:54 PM

A lot of figures have trouble with hands and IK.  Strange bends, popping
off the wrist, slipping sideways, etc.  I suspect the creators paid close
attention to IK on feet because it's more commonly used, but not so
much attention to the hands.

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