Studio ItemBoneList Generation - IllusionMods/KoikatsuModdingTools GitHub Wiki
KoikatsuModdingTools can automatically generate ItemBoneList files for making Studio items posable with FK. To begin, ensure that you have first set up the ItemList files properly. Open the List/Studio folder that contains the ItemList files and click Assets/Create/ItemBoneList.csv. An ItemBoneList file will be created for each of the ItemList files.
Within the generated ItemBoneList is a comma separated list of item ID followed by all the bones you want the user to have access to. When the ItemBoneList is generated in this way, the bone list consists of every transform in the item's hierarchy which may not be ideal. You can remove any redundant bones from this list and remove any entries for items that do not require FK. After cleanup, remove the "_generated" part of the file name to have a functional ItemBoneList file.
Because the list is generated with "_generated" in the name it is safe to generate this list as many times as required for additional items added later without overwriting any existing list files. Simply copy/paste any new lines in to the existing file and remove the generated file afterwards.