Unfortunately, hand painting anything is my weak point. I can modify textures of they are not
too complex, but anything involving real 2d art is beyond my limited skill. I have to go wth 
this method because it's they only one I have the skill to use. Though it might be possible 
to do what you suggest by using the grouping tool to make new MAT zones for the areas
that sweat the most. I'll have to experiment. The MAT room is rather intimidating, which is
why I haven't explored it much. :)

Greywolf