i'd also like to know more about grouping. for instance, the aiko arabian nights pants already have conforming parts for the legs. they also have materials for just the puffy part i want to be dynamic. should i just rename the relevant leg parts? what seems logical is to remove the puffy/dynamic parts from the body part groupings and make an new dynamic part that includes all of the puffy/dynamic material. how might this be possible? i haven't been able to create groups that span any of the premade groups....