HDRIs of various landscapes such as mountains, deserts, and forests.
A vast grassy field was captured at 14:00.
JPG photos and a panorama for the camera background: https://photos.app.goo.gl/jXjMVc9S1sUPK7wZA
Sun is unclipped, so in Cycles, you don't need any light source, other than this HDRI for very realistic shadows.
Methodology: 7 expositions with 2EV spacing + 10 expositions of the only sun with ND4096 (12 stop) filter.