You can use a blending node plugged into the the diffuse node with the Math Function node (or image map 4 node in a different way) plugged into it as a mask. You'd have to play with the settings a little since I don't have poser here to look at I can't really help here.

there is a nice tutorial on Blending nodes in the tutorial section. They use it to apply make up to a figure, but the method works here as well.

Nice shader tree BTW.

Message edited on: 09/22/2005 15:28