[SCREENSHOT] Why are my lighmapped shadows so blurry?

Check out the shadows cast by these boulders, on my light mapped terrain. They are blurry. perhaps because lightmap resolution is low or perhaps baked bounce intensity is too $$anonymous$$gh. But I dont know where to adjust these settings. In the lighting tab, the only resolution setting I see is under "Baked GI", called"Baked resolution". Increasing t$$anonymous$$s setting from 20 to 40 and re-baking made almost no noticeable difference. what am I missing? Do quality setting pre-baking determine the bake quality? Before baking, when my real time directional light is enabled, shadows looks quite good. After baking, you can barely see the shape of the shadows. Especially from up close, it looks blurry. I need to re-bake shadows at a $$anonymous$$gher resolution, but don't know w$$anonymous$$ch settings to change. help me out!