TedNindo wroteMy plan was to assign the reference via Inspector. Which seems not the right way to do it. So thank you for the explanation.
I'm not quite sure what you mean by "assign the reference via Inspector". Anyway, glad you've figured it out!
TedNindo wroteJust one quick addition: it seems to be [ constraint.rotateMix = mix;]
At least if you use an Animator like me.
Ah, you seem to be using spine-unity 3.8 then, in 4.0 and newer these properties have been renamed from rotateMix
to mixRotate
for consistency reasons. 🙂