Basically set up poser hand animation of some of the basic hand animation and then render it out to PNG(with alpha channel) file with no background.
Then make a switch layer file for each of the hand movement.
in this case I have one for:
"open hand to fist"
"fist hand turns"
"come here"
I use toon shader on the poser hands and arm and with ambiance setting of 1 and no lights
Firefly render with "thick pen" toon outline "on"
even tho I use a color picker to adjust it still came out brighter so I shaded the whole hands layers.
