The technology behind RTGI was eventually adapted by NVIDIA for use in their NVIDIA FreeStyle and Ansel driver modules as "SSRTGI". RTGI 0.17.0.2 Release! - Patreon
Applying the shader can fundamentally change the atmosphere of a game, transforming flat, shadowed areas into rich, dynamic environments.
RTGI, or Real-Time Global Illumination, is a technology that enables the simulation of indirect lighting in 3D environments. Unlike traditional lighting methods, which rely on pre-baked lightmaps or simplistic approximations, RTGI accurately models the way light interacts with objects and surfaces in a scene. This results in more realistic and dynamic lighting, which is essential for creating an immersive experience in games, simulations, and other interactive applications. rtgi 0.17.0.2 release
Unlike hardware-native ray tracing (like Nvidia RTX or AMD DXR) which builds a BVH structure of the entire 3D world, ReShade RTGI operates as a . It intercepts the game's depth buffer (the data showing how far objects are from the camera) and casts virtual rays across the pixels visible on your screen.
A decent GPU is required. Despite being "hardware independent" (not requiring RT cores), the computational load is heavy. The technology behind RTGI was eventually adapted by
The shader became much smarter at distinguishing matte surfaces (like carpet or dirt) from reflective surfaces (like wet asphalt, metal armor, or polished marble). This added a layer of material accuracy that rivaled native engine retrofits. Step-by-Step Installation Guide
Work continues on , which will introduce experimental ReSTIR DI (direct illumination) sampling for more coherent lighting in fast-moving scenes. Expect an alpha build in the coming weeks. RTGI, or Real-Time Global Illumination, is a technology
Version 0.17.0.2 patches a decade-old screen-space border issue that caused glowing or dark halos at the edges of ultrawide (21:9, 32:9) and VR (stereoscopic) resolutions. Modders using VorpX or high-FOV configurations will find the shader now usable without custom cropping hacks.
Improved the consistency of light over time to minimize the "wobbling" effect common in screen-space ray tracing solutions. ReShade RTGI | Ray Traced Global Illumination
RTXGI 0.17.0.2 is an essential update for studios and independent developers leveraging real-time ray-traced illumination. By tackling core challenges like light leaking, VRAM optimization, and volume stability, this release ensures that dynamic global illumination is no longer a luxury feature, but a production-ready standard for next-generation visual fidelity. To help tailor any further technical details, tell me: