Hello, I made my first model in blender and I animated it. It looks fine when I play the animations through blender, but when I import it in unity the arms are broken on the first frame: So I messed around a bit in blender and it seems like the problem is from there, because I can reproduce it. If I go from the t-pose straight from to the run animation, I get this: it's pretty much exactly the same thing. It's like the top of the arm IK doesn't follow the shoulder and stays where it was in the t-pose. Note that it ONLY happens when going from t-pose to run animation, If I then click on keyframe 0 I get this: I also don't ever see this bugged frame when I loop through the animation with blender. If I make the unity animation start from frame 1 the bug doesn't appear, but then the transitions aren't perfect. This only happens with the arms. Here's my arm's setup: IK on forearm + upper arm. no deformation. upper arm's parent set to the shoulder. Target set to hand. and there's a pole behind the character. 2 smaller bones for deformations. set to follow location + rotation of ik bones. upper arm deformation's parent set to the shoulder. shoulders follow rotation of upper arm, with limits to rotation. Does anyone have any idea why this happens?