The First area you see in the film is a simple meadow, though it had went through several stages.
You can see a fairly close to finished version here, with an early version lighting set up.
This version of the scene had a fairly basic lighting set-up, with the skysphere providing most of the lighting and a set of directional lights casting tonal shadows.
I also added an area light to cast a yellow tint across the ground, and a disc light to emulate the bright sun beams.
This particular version didn’t have quite the light intensity we needed and rendered out too dark, so I bumped up some of the directional exposure.
This worked much better, though as you can see the light didn’t cast as strong a shadow set as I wanted, so like can be seen in the Gif at the top, the characters had highlight put just behind them to cast a soft rim light onto them.