The shader by Pascal Gilcher (Marty McFly) is a popular ReShade plugin that adds software-based ray tracing to older games. Version 0.17.0.2 is a specific release that focused on stability and compatibility with newer versions of ReShade.
Unlike native RTX ray tracing that requires specific hardware, RTGI is . rtgi 0.17.0.2
Enhanced how the shader interprets existing colors on screen to generate realistic "bounced" light and ambient occlusion. How to Access and Use RTGI (Ray Traced Global Illumination) The shader by