I almost made a new thread on this and still might, it's so god **beast** awesome.
Shadows on the pc version **beast** ass, they are all blocky and this and that. I knew there where some issues going into the game with a pc because it is primarily a console game, just like oblivion.... but the community and mods made the pc version so much better imho.
anyway, this isn't a mod but a fix for pc users, however it doesn't fix everything but it does fix a LOT.
go into your ini and go to skyrimprefs (save a copy first). find the value fShadowDistance and set it equal to 2500, whalla most shadows are fixed. there are still some shadows that are not fixed and it has to do with cascading, which will be fixed later on (right now it is hard wired to be set at 2, the value for the consoles and their resolutions/needs)
this is also important, go into your skyrim folder and make a shortcut to TESV and put it on your desktop and run directly from that from now on. if you run it through the other it will reset the ini to whatever it was every single time.
also be sure to get the latest driver, nvidia has one specially tailored this game
all hail the crimson king