The tool to make it, Nvidia RTX Remix, will also launch with it to allow modders to add ray tracing to other titles.
To showcase the power of DLSS 3 and Nvidia’s recently announced RTX 40 Series, the company has worked with Valve to release Portal with RTX.
As for Portal with RTX, it also features high resolution physically based textures which are hand-crafted and high-poly models.
The ray tracing applies to every light source, from global illumination indirect lighting to volumetric ray-traced lighting that scatters in fog and smoke with perfect shadows.