Is "SigmaSeries" a specific you are trying to configure? HOW TO ADD INSTANT SKY & HDRI TWINMOTION 2024.1
Are you targeting a or an offline path-traced final output?
In the Image Name field, point the folder directory to your high-dynamic-range file.
In your level view, go to the panel and search for Sky Light . Drag it into your viewport.
The 720p resolution allows for a more "filmic" texture that hides the sterile sharpness of digital sensors.