The latest Poser newsletter described how to properly use the new HDRI background feature, so I thought I'd give it a try. This is the result.
This is my third render in P14, the first one successfully using an HDRI image. There are NO lights in this render -- just the background image in the "Simple" materials tab. (I'm pretty sure that background is AI. I've NEVER seen an aurora looking like angel wings.)
One caveat. P14 doesn't allow me to adjust the size of the image, just its rotation. So I rendered onto a transparent background and stitched this together in Photoshop.