So a while ago i worked with an animator who requested that she had the ability to shape the wing after the bird tucks in the arm. The FK to FK system was born!
![](https://static.wixstatic.com/media/d7e6be_bbe20078f4d24b8482c3acf342e9172d~mv2.gif/v1/fill/w_980,h_552,al_c,usm_0.66_1.00_0.01,pstr/d7e6be_bbe20078f4d24b8482c3acf342e9172d~mv2.gif)
Think of it like a IK to FK but instead you have you rest control chain and your open chain.
If you get the blending of your feathers just right it work perfectly!
In this setup i used a combination of matrix nodes to blend the feathers, and 3 joint chains a Fk for the wings, Fk for the rest pose and a result chain.
![](https://static.wixstatic.com/media/d7e6be_d0dde653195f423fadd5eebe7763241f~mv2.gif/v1/fill/w_980,h_553,al_c,usm_0.66_1.00_0.01,pstr/d7e6be_d0dde653195f423fadd5eebe7763241f~mv2.gif)
Again if you need me to run you through it reach out. Jason
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