Alex Battaglia:
“Nvidia showcased a number of ray tracing titles at its GeForce RTX launch and it was 4A Games’ Metro Exodus – alongside DICE’s Battlefield 5 – that impressed us most with its implementation of ray tracing technology. In fact, RTX on vs RTX off within the 4A title demonstrates the challenges and opportunities of the new hardware: right now, it seems we need to choose between remarkable realism and accuracy with a significant performance overhead, up against lighting based on established techniques – less accurate but still good-looking and much faster. Which will prevail?”
Source: N4G PC How Metro Exodus uses Nvidia ray tracing to stunning effect