Path tracing is a rendering technique used in computer graphics to create realistic images. It simulates the way light travels through a scene, and can produce very high-quality images. However, path tracing can be computationally expensive, so it is not always used in real-time applications.
One way to test the performance of path tracing is to use a game that is known to be graphically demanding. Cyberpunk 2077 and Alan Wake 2 are two such games that can be used to test the limits of path tracing.