I'm aiming to create an all natural landscape environment with soft grassy hills. I'm imaging the main focus areas to be pretty simplistic, with a few trees for the focus point. In the distance, there'd be mountains and more trees. Since this scene will mostly be simplistic, I think it'll be a challenge to make it look good using just a few assets. I'm hoping to go for a tranquil mood with the dusk setting.

Edit 11/14/20: Added new screenshots with new lighting using the Hemisphere skies.