The factory_hall.hdr environment map is copyright © by Bernhard Vogl (salzamt@dativ.at)
See http://dativ.at/lightprobes/index.html

The sunny_sky.hdr environment map is copyright © by openfootage.net and released under a Creative Commons Attribution 4.0 International License
See http://www.openfootage.net/?p=137
This file was modified slightly from its original distribution to move the location of the sun.