If you compare it to the sequence used in the game, you will notice the "movie" Allanor has clouds and even a storm on the dark side of the planet. Since the backstory of Allanor was only hinted at in the game, and since it help developing areas "knowing" their backstory, I imagined that the Chodak polluted their homeworld and eventually had to leave it. The heavy industry on the planet's surface could hint into that direction.
Anyway, I am quite satisfied how this one turned out (positioning the camera to mirror the game sequence was a nightmare). Enjoy!!!