Sharper, smoother shadow transitions?

[Systemlord30]

I should let you know first that I'm playing on shadows setting to medium and all others to max, my graphics card is my limiting factor for shadows. I have looked any many ways to fix this issue, but none seem to do anything. How do I make my shadows crisper sharper looking and also make them transition on a slower time scale that won't take a performance hit?

 

Thanks,

Systemlord.