Bethesda worked with technology company Nvidia to implement volumetric lighting through a technique that makes use of hardware tesselation.[2][3] Additionally the updated version of the Creation Engine powering Bethesda's Fallout 4 offers more advanced character generation.A primary issue facing the developers was that components of the core engine (dating back to Gamebryo used in The Elder Scrolls III: Morrowind) such as quests or world loading were designed centering on a single player (dubbed "Atlas" by the developers for its role in holding up the fabric of the loaded game world), a paradigm that would need to fundamentally change to allow multiple players spanning multiple worlds.Bethesda Game Studios claims the improvements also allow for a 16× increase in detail and the ability to view unique weather systems occurring at a distance.[17] The tool can be used to create worlds, races, NPCs, weapons, update textures, and fix bugs.