Hmm, I just tried, but I couldn't get it to work.
I added joint-8-socket-frica.dat to the shadow library with the line you specified, but it doesn't work. It's probably me who's doing something wrong, right?
I added joint-8-socket-frica.dat to the shadow library with the line you specified, but it doesn't work. It's probably me who's doing something wrong, right?