The revised engine includes a number of developer-friendly enhancements, such as increased efficiency and a redesigned user interface, but the most significant upgrades come from a handful of technologies that enable more photorealistic images. These include Lumen, which Epic describes as a “completely dynamic global illumination solution” that enables more realistic lighting, and Nanite, which Epic describes as “a technology that enables the creation of games and experiences with huge levels of geometric complexity.” There are also more practical tools, such as the ability to split off pieces of an open environment to allow teams to work autonomously on certain areas. Together, these technologies are supposed to simplify the process of creating large-scale, high-fidelity games; CD Projekt Red has already indicated that it will use the technology to create the next Witcher.
