If you followed that link, it led to another link where I give math calculations.

I won't repeat them here, except to say:

If you plan to render 1000 pixels wide, and you are using an 8000 pixel wide image, and you want the panorama pixels displayed 1 to 1 in your render, you must have a field of view of 45 degrees. To get that you must set your Poser camera to about 30.78 mm.

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)