The lined shadows in the breezehome are caused by the roster thats on top of the fireplace. I'm kind of surprised no one has noticed this before. The jaggies are just poor programming.
I disagree, as this anomaly is repeated elsewhere in the game, the jaggies are the fault of gamebryo's rendering engine.There are 20 yr old games that utilize dynamic shadows much MUCH better, https://www.google.com/search?q=severance+bod&num=100&hl=en&safe=off&client=opera&hs=NHR&rls=en&channel=suggest&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=Qo_jTtmmIc2btwfShJjnBA&ved=0CEgQsAQ&biw=1082&bih=573 easily comes to mind.
(A more detailed bit of info, from someone's post in this very thread) V
I get this as well, BOTH inside and outside. I've had it since launch, it's very annoying. It's known as "Shadow Acne (Fig.8)", which is all explained below. It's a very common problem during development, but is usually fixed BEFORE release. This also explains why the shadows (Fig.5) in the Skyrim look so bad too.
http://msdn.microsoft.com/en-us/library/windows/desktop/ee416324(v=vs.85).aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/ee416324(v=vs.85).aspx

