Fallout 3 was released in 2008 and Fallout: New Vegas came out in 2010. If we compare DOOM 3 chain-link fences
to Fallout: New Vegas chain-link fences,
we can see Fallout has much more poorer quality in graphics than in DOOM 3. Reason is obvious: Fallout: New Vegas can be said that it is technically related to Fallout 3. Fallout 3 and New Vegas are both open world games, where 3d spaces are vast, containing massive amount of textures, while DOOM 3 and PAYDAY 2 are based on narrow 3d spaces, containing lots of textures but better in resolution. DOOM 3 is a scripted tube run game, where player cannot go back where he came from after certain border crossing, which means level transition. So Fallout: New Vegas is an open world game, which needs to maintain lots of textures but poorer in quality, while DOOM 3 is a level based game, which needs to handle only textures belonging to current level, but better in resolution.