So I was browsing forums and came to this on
the official LL forum and found this tidbit:
Tyr Rozenblum Wrote:Animated mesh: I know that I have helped contribute to many users fall im frame rate (sorry guys you know ILU), doing mesh creatures with my partner Nina. The problem is saving frame for frame and over lapping mesh using alpha is just, not a responsible way to do things. Yes we still do it, but its the only way to have any kind of animated pets and animals via mesh. Is there plans in the future to add ACTUAL ways to do animated creatures? You know without killing your friends and loved one's frame rate.
and this was the answer from Ebbe Linden our CEO:
Ebbe Linden Wrote:Yes, we plan to support custom skeletons.
Now, this post (dated July), is very brief, cast in the future as something not yet done, and does not address the issues of NPCs exactly, although the question that was asked was asked specifically in the context of animated pets and mesh animals. I would say it looks like a positive answer on something that they haven't done yet.