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diffeomorphic rigify IK foot posing: leg shorten instead of bending

rocthered_1819485rocthered_1819485 Posts: 32
edited August 2022 in Blender Discussion

Hi everyone,

I have a strange problem. I transferred a character to blender with diffeomorphic and "convert to rigify" immediately. The strange thing is when I posed the foot with IK, instead of bending the knee it made the leg short and stout (see the image).

It does not happen to base figures, but only to this figure that I heavily modified from genesis 8 male. However, I put a lot of time and effort into it, so if possible, I do not want to do it all over again, especially when I do not know what caused this. 

Anyone can help? Thanks a lot!

 

 

Snipaste_2022-08-18_10-04-13.jpg
366 x 580 - 40K
Post edited by rocthered_1819485 on

Comments

  • wolf359wolf359 Posts: 3,830
    edited August 2022

    @rocthered

    Hi , heavily modified  Genesis figures figures who’s limbs have been altered from the base default length ,in daz studio, will have some issues when both posing and retargeting animations to the rigify rig.

     

    Most are easily correctable by turning on the tweak bones that are essentially the  pole targets of the knees & elbows.

    from there you can correct the “squashing”manually as I had to do when placing this riders feet&hands.

     

    THE GRID TRONtweak.jpg
    1586 x 930 - 860K
    Post edited by wolf359 on
  • rocthered_1819485rocthered_1819485 Posts: 32

    wolf359 said:

    @rocthered

    Hi , heavily modified  Genesis figures figures who’s limbs have been altered from the base default length ,in daz studio, will have some issues when both posing and retargeting animations to the rigify rig.

     

    Most are easily correctable by turning on the tweak bones that are essentially the  pole targets of the knees & elbows.

    from there you can correct the “squashing”manually as I had to do when placing this riders feet&hands.

     

    Uh yes. Thanks for the suggestion! It's much better than doing it all over again..

  • PadonePadone Posts: 3,730

    Rigify needs prebended limbs for ik to work. So some figures may need "optimize pose for ik" before converting to rigify.

  • rocthered_1819485rocthered_1819485 Posts: 32

    Padone said:

    Rigify needs prebended limbs for ik to work. So some figures may need "optimize pose for ik" before converting to rigify.

    It worked! Thank you so much! 

  • rocthered_1819485rocthered_1819485 Posts: 32

    Padone said:

    Rigify needs prebended limbs for ik to work. So some figures may need "optimize pose for ik" before converting to rigify.

    Hi @Padone,

    Looks like after I do "optimize pose for ik" , the character has some mismatch between object mode and edit mode (one with legs more spread than the other). Do you know how to match them again? Thanks!

  • PadonePadone Posts: 3,730

    You have to "apply rest pose" to make the prebend effective for ik. I'm not sure why "apply rest pose" is an option, it makes little sense to me to prebend without the rest pose.

  • rocthered_1819485rocthered_1819485 Posts: 32

    Padone said:

    You have to "apply rest pose" to make the prebend effective for ik. I'm not sure why "apply rest pose" is an option, it makes little sense to me to prebend without the rest pose.

    Yes I did that. In fact only "apply rest pose" fix the problem of legs not bending. But then the pose in edit mode is a bit different from object mode, making it a bit annoying to modify the mesh further. Is it possible to fix that? 

  • PadonePadone Posts: 3,730

    That's not possible by definition, since "apply rest pose" bakes to edit mode. Please verify. Then if you're sure of the issue we need more details, as your blender/plugin versions and the exact steps to reproduce the issue, possibly with a test scene in duf format.

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