Regarding 3D Character Materials

3D character materials are composed of body [parts] such as arms, fingers and head.

Each part has "standard bones" configured, which move in the same way as human joints.

Since the [Bones] of each part are linked, moving a part moves other parts as well.

In Clip Studio Paint, poses for a model are defined by moving/rotating the parts.

For 3D character materials configured with physical settings in Clip Studio Modeler or Clip Studio Coordinate, physical settings are reflected when the 3D character materials are moved. For details on Clip Studio Modeler, see clipstudio.net.