If I get what you are trying to do is allow the user to set the dress to blue and then if they want it shorter apply a mini-skirt transmap and leave the color alone vs supplying a Blue long mat pose and mini skirt blue mat pose.

The only way I know to do this is via the method supplied-described by markshum which is use a python script.

I have created a my own pantyhose scripts that allow me to set the color and then apply different masks to make them all sheer or give them a panty (add a darker mask to the panty part) and I did it by scripts as markshum suggests and it does not effect anything else attached to the poser material surface tree in my case the hip zone.The color remains the same as do all other settings.

The only alternative that I know of is break the skirt into zones, Short, mid, long and then apply a mat pose that hids those zones. But if you are short and want to go to the long style you then have to supply a mat pose for every color. Via the script method that markshum supplied you don't.

 

Hope I understood your intended goal-objective.

 

You can call the script from a mat pose with the knowledge that a poser bug will cause the script to fire-run twice if it is called from a pz2. If it is called from a cr2 it only runs once. Which isn't an issue unless you are checking to make sure the proper item-prop-figure is selected and throw up a dialog if it is not. Because if you do the dialog will appear twice when you call the script from a pz2.

Gary

"Those who lose themselves in a passion lose less than those who lose their passion"