I needed something like this some time ago and I made this mod. basically the FULL state/Half State are done only by overlays and not mesh edit. just add the overlays on the following materials. STATE A - full state STATE B - half state the meshes do not contain any differences. so any changes you want need to edit the "overlay".
♦ contains 3 types of body meshes for overlays
♦ alvarna artoria latex style
Thanks to ALVARNA for authorizing me to make a mod with some overlays for testing too

