After leaving Vault 101 in Fallout 3, the world is presented as dead, dying, and free. The first view the player receives, after passing a horde of skeletons and exiting their Vault’s cave, is an open, white sky and an open road. This first section, after the strict linearity of the interior of the Vault, is effectively guiding the player to a few set pieces, but is incredibly important in terms of establishing a sense of utter openness to the experience as a whole.
Adam Adamowicz was the primary artist for Bethesda Studios during the production of both Fallout 3 and Elder Scrolls: Skyrim. he sadly passed away but he pumped out so much artwork for Fallout in particular that he defined the entire art style of the franchise as it continued after his death with Fallout 4.