NVIDIA Adds Ray Reconstruction to Portal with RTX

So players will be able to enjoy improved fidelity of full ray tracing and dynamic lighting effects as Ray Reconstruction updates lighting effects faster. As a result, "certain patterns associated with reflections are recognized, keeping the image stable and generating high quality reflections." 

"Additionally, Ray Reconstruction greatly improves the clarity and fidelity of water reflections, eliminates light speckle artifacts on fine details, such as chain link fences, eliminates ghosting on moving objects, such as ventilation fans, and increases the fidelity of shadows cast from aforementioned moving game elements."