Visit the official ReShade website and download the latest version (the version with full add-on support is recommended for offline games to ensure depth-buffer access).
The Ishimura is dark by design, but old lighting made shadows pitch black. With RTGI 0.17.0.2, the darkness becomes "luminous." You can see the outline of the floor and walls via reflected light, increasing tension rather than frustration.
RTGI is a shader plugin designed for ReShade , a generic post-processing injector for games and video software. Unlike traditional screen-space effects that simply darken corners (Ambient Occlusion), RTGI aims to calculate how light bounces off surfaces, bringing realistic lighting to games that were never designed for it. The Significance of 0.17.0.2
. As the game loaded, the familiar sun-drenched streets of Los Santos appeared, but they were... different. The light didn't just sit on the surfaces; it breathed. rtgi 0.17.0.2
⚠️ Do use with older ReShade 4.x – missing math functions.
This was the standout feature of the 0.17.0.2 update. By rewriting the sampling code, Gilcher essentially increased the shader's efficiency without sacrificing image quality. In practical terms, this meant that users could achieve the same high-quality lighting results while using fewer computational resources, leading to higher frame rates.
Finally, v0.17.0.2 incorporated a that retained small details much better than previous versions. This refinement helped reduce the grainy or noisy appearance that can plague global illumination effects, especially in shadowed regions or complex scenes. Visit the official ReShade website and download the
Unlike native ray tracing baked into game engines (like Unreal Engine 5 or Cyberpunk 2077’s Overdrive mode), RTGI works using . It utilizes the game's depth buffer to calculation how light bounces, casts shadows, and bleeds color across visible objects on your screen.
The 0.17.x branch of RTGI is highly regarded in the modding community for stabilizing performance while significantly reducing the "ghosting" effects prevalent in earlier releases.
float roughness = getRoughness(texCoord); float stepSize = lerp(MIN_STEP, MAX_STEP, roughness); RTGI is a shader plugin designed for ReShade
represents a milestone beta release of the ReShade Ray Traced Global Illumination (RTGI) shader developed by rendering engineer Pascal Gilcher, widely known in the gaming community as Marty McFly . Released on October 30, 2020 , this version fundamentally altered how the modding community handled real-time screen space lighting overrides. By intercepting a game’s depth buffer via the ReShade framework, RTGI mathematically simulates the physical behavior of light rays bouncing within a scene. This technology successfully bridges the historical gap between flat rasterised graphics and accurate modern lighting hardware. Core Technical Architecture
If you need help configuring this shader for a specific title, tell me: What you are modifying? What graphics card do you use? Are you facing any error logs or performance drops?
Accurately calculates light "bounce" from a surface onto surrounding geometry, transferring color information from bright objects to adjacent dark areas.