Softer Shadows in SunSky

Hi there, I was wondering if anyone can help me? I am using SunSky and all of my shadows have a very hard edge. I was wondering how to soften them? For example, in Directional Light you have the option to adjust Distance Field Shadows, but no such option in Sunsky. If anyone has any tips on how to soften the shadows using SunSky, even if inside the Post Processing settings, Id be very grateful. Thanks!