HDRI is an image format that has greater light information. The images are 360° and you put them on a large sphere or the background texture. That needs a special setup which I can't show you at the moment since my computer is busy rendering. We have some in the marketplace. O the wise, polyhaven has a large selection.

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Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
Check out my store here or my free stuff here
I use Poser 13 and win 10