Quote - That's an issue of MD's calculations between the original and the morph target:  it runs a straight-line interpolation between the two points.  So, if an arm is down and to the left at the start, and is supposed to end up over the head on the right, MD will try to run the arm straight through the body to get there.  The work-around is to have a series of intermediate poses.  Gradual changes work best.

 

Yeah. That's how it used to work for me, but now even a fairly small change in pose sends the arms flying in and out insanely. I think it must have been one of the updates that did something weird, but I can't get it back to how it was. Ho hum.