So, I understand the basic perspective behind animated textures. But how would I assign an animated texture to a given area on a mesh? Here's an example of what I want to do? Say I have a model of Wind Waker Link and I want to give him an animated face (like in that game). How would I assign the animated texture to the face?

Also, how would I make a De Blob-style material change? In that game, buildings and other objects change color by having another color spread across them and "assimilate" the previous color. Is this possible in Poser?