how can i do to background visible?

My background looks transparent. What can I do to make the sky visible like daz?
i can't find poser option to background visible..
and can anyone tell me change my hdr sky?
when i load only hdr sky light and rendering, it just look black. no sky.
I'd like to ask the producer, but there's no way to contact him.
i bought this:
https://www.daz3d.com/orestes-iray-hdri-skydomes--cassini


bgerror.png
2332 x 1420 - 4M


original.jpg
1292 x 1074 - 286K


er03.jpg
3350 x 1722 - 334K
Comments
https://forum.smithmicro.com/topic/72/how-to-load-an-hdri-image-file-in-poser/3