Jup not perfect jet, to add a skin after the veins it requires to use a Mat-Pose , I actually did not even think of using a Material as the older V4 setups are in most cases Mat Pose it is rather new that this has changed, guess it is because all the older Py that were generating these Mat Poses are not working any longer in Poser 13 and there are no alternatives creating these any longer, like many other things that were in need of these Little py helpers.

Your Animation control panel looks very interesting  Woow ! I never used animation features on the materials, a entirely new learning curve for sure :) If it works like you say that for sure a breakthrough of no use for all these alternative mat Poses. Except of coloring but strength would sure already be a great option. Now got to look into these Animation options ant figure out how that works ......

just guessing .... can this mat animation also be saved into the mat file ?! this would change the whole aspect and be generated as Mat-Pose with interactive materials :)