Trouble with combining Mixamo Animation in NLA

Hey,

I’m having trouble with this transition using some mixamo animation.
The start animation is a Sitting Idle Animation.
(https://www.mixamo.com/#/?page=1&query=Sitting+Little+Girl)
The second animation is a Standing up from Seated Postion Animation
(https://www.mixamo.com/#/?page=1&query=Stand+up+from+Seated+Postion)

However the arms pivot inward. Any idea what is going on or how to fix this?
The loop shows what is supposed to happen in the left armature and what is happening in the right armature.

Thank you

Bad animation effect

I’ve run into similar problems with the NLA editor. I just manually combined the two actions in the layout window using the graph editor. Hope that helps.

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I would guess it’s because of rotation orientation order- XYZ evaluates differently from YXZ, which evaluates differently from quaternion. Either that, or it’s gimbal lock, which actually on second look seems more likely. See how the shoulders just start drifting at a certain point? Lock up “gimbal lock blender” to learn more about this problem.

As far as solutions go, the only options are to use quaternion rotation or manually fix offending keyframes. I don’t remember if Mixamo uses quaternion, I’m inclined to think it does not from your GIF, so manual fix it is

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Hello the replies. I am still looking at how things work. I did find that it seemed to work better when I downloaded the Combined Armature + Skin Mixamo Animation for ALL animations, than just one animation and then just getting only the Armature for the subsequent ones. A slower, but blends easier and simplier.