Pascal Gilcher distributes his shaders primarily through a subscription-based model:

To use the RTGI shader, you must have installed on your system.

The search term refers to a specific version of the Ray Traced Global Illumination (RTGI) shader created by Pascal Gilcher, also known as Marty McFly. This advanced post-processing effect is designed for use with ReShade, a generic post-processing injector for games. What is RTGI 0.36.1?