As part of a larger rig, I'm trying to achieve the effect where a deformation bone copies the location of a root bone, and the rotation in the Y&Z axis, but when rotated on the X axis only copies the rotation by 25%.
I'm having some very strange behaviour when the root bone goes beyond 180, the axis flips.
I've tried both a Copy Rotation with limited influence, and also a Transformation constraint where the X axis is mapped from -360/360 to -90/90. Both have the same issue. I've also tried different rotation modes changing between Quaternion and Euler, no change. Hoping someone can help!