The RTGI landscape has seen many updates, from early experimental builds to the modern "Legacy" and "General" branches. So, why is the still in high demand?
It is important to clarify the official source for downloading RTGI. The RTGI shader is a paid product, created and maintained by Pascal Gilcher. The official method to obtain any version, including 0.17.0.2, is through his page.
Inside the unzipped folders, locate the Shaders and Textures directories.
While later iterations like the Marty's Mods iMMERSE Pro series introduced advanced features like motion vectors and spectral rendering, build holds a special place in the modding community for several reasons:
It runs beautifully on older, non-RTX graphics cards (such as GTX 10-series or older AMD hardware) because it calculates ray tracing entirely through software-based screen-space mathematics.