Section8
Cipher
I think they said characters and static objects (which pillars and building would presumaby be) cast shadows. It's just miscellaneous items (chains, bones, etc - basically items you can interact with) that don't have shadows any longer.
Actually, in about 15 threads over on the ESF, they dodged the "do static objects cast shadows" question about 100 times. Of course, being the ESF, all the fans said "Well, if they're dodging the question, it must be true!" Huh?
I'd be willing to bet that only characters and foliage cast shadows.