I've got hold of a big shiny metal ball (from a garden centre) and have been playing at creating my own panoramic HDRI's
From this:
To this:
To this:
From this:
To this:
To this:
Below are 3 different exposures of a room, that when passed though special algorithms can produce the larger image, which is meant to be more evenly exposed revealing the dark room and the bright outside despite there drastic difference in real brightness.
The blurriness is because I took this without a tripod, It's just a quick 5 minute test.