I hadn't used trusespace in a long while but what I recall is that when you choose to use an IBL light. a 3D sphere is displayed in whole. But with the lower half unused from what I gather. Its also positionalble. Thats the one thing I really hatre about poser they don't have light cone reprentations for the spot lights or even a sphere for the IBL to inform you how the image applied to it is oriented.

You're right I hadn't considered the my 3D environment wasn't going to deliver that whole dynamic range. I didn't realize it but it seems Photoshop has built in panorma sticthing and the ability to geberate an HDRI image based on different excposures of the same image.

But just to play around Im going to render differnt camera positions and stitch them into a 360 spherical view. Then I my do the same at different light intensities. Just to see what I get.

Pete