I’ve used it a little bit but I’m having issues with, say, a mesh suddenly reverting to a T pose, or when I try to add a root location action strip the mesh starts to drift backwards. I am sure it’s at least partly due to my inexperience with settings like ‘hold’ and blend modes etc.
I suppose my question is: is it eventually possible to master the NLA editor completely and have it do exactly what you want, or will it always be a little bit unpredictable?
If you’re planning to work with the nla-editor your actions you want to blend should only contain keyframes which are necessary.
I.e. constant keyframes of an action which actually are unnecessary/redundant may unintentionally override keyframes of nla-tracks above using replace blending mode or cumulate using add blending mode.