It is easy.  I set it up so with any given patern, you only have to change the diffuse and maybe the trim

Of course setting up the paterns takes a little time, but I am doing this so I can have just about any stype off of the basic mesh.  No longer testing poke through etc each time I do a different dress.

Of course you can also with trans maps use the basic dress as a top or skirt

Bill

People that know everything by definition can not learn anything