100% linear 32bit workflow, full EV range, 20k resolution. USE UNCOMPRESSED 32bit ORIGINAL FILE FOR THE BEST RESULT.
Tutorial on how to set nodes with JPG background panorama:
https://youtu.be/aj0LoQLjgYo
Color-graded 20k JPG panorama:
https://drive.google.com/drive/folders/1ttxLjBkbfHpKj6bor-2wA8Ta8xEvBWK1?usp=sharing

16:00, Summer, sunny, thin cloud cover. Grassy field next to Narew river in Narew Landscape Park. Well lit pine forest, about 300 meters away from the the camera, is a great backdrop. Few bushes are closer to camera giving different mood based on camera angle.

Sun is unclipped, so in Cycles, you don't need any light source, other than this HDRI for realistic shadows.

Methodology:
7 expositions of the environment with 2 EV spacing (140 photos) + 7 expositions with 2 EV spacing of only the sun with ND4000 (12 stops) filter + 7 expositions with ND1000 stacked with ND4000 filter (10+12=22 stops).