Ante todo Nass a tod@s, este es mi primer post.
De casualidad, me topé con un link a una página en la q muestran un addon que facilita el uso de ghosting (referencias en viewport de los keys):
Just wanted to let animators on the list know I just released a
> ghosting/keying solution called GhostKeys. While being able
> to see the ghosted positions of animated objects is great you
> can now edit these positions to change the original ghosted
> object's positions. Basically, you can set down a key at the
> beginning and end of your action, then block out the timing
> and spacing of your arcs in one shot.
http://archives.itg.uiuc.edu/softimage/xsi/2003-10/msg01248.htmPo eso, a disfrutarlo.