For Oblivion interiors, they include objects (or paths) deemed to have the property of casting a shadow, “casters” if you like. Interiors have a similar canonical list for shadow receiving, the above lists are from users, so may not be complete. There are also types for interiors, and some of those, Skill for example, won’t make any sense as far as shadows are concerned. 😛
Ditto above for Oblivion exteriors. 🙂
