Thanks maxxxmodelz, but I'm looking for shadows that depend on the position of the light source. Imagine a ball on a plane and a single low light source from the side. The ball should throw a long soft shadow towards the opposite side. AO won't give me that, right? Maybe though I could use an AO light with an appropriate light probe together with a shadows-only spot with the shadow blur radius set to maximum. Another idea that occurred to me is that one could use alternate diffuse to do the job. I've no experience with that, though, so any pointers on how it can be used would be appreciated.

-- I'm not mad at you, just Westphalian.