Reshade Ray Tracing Shader Rtgi 033 Jun 2026

The shader works by analyzing the depth map of the game to create a 3D representation of the scene. It then casts rays from the camera to determine how light should interact with surfaces, providing realistic soft shadows and light bleeding from neon signs, fires, or the sun. Performance Considerations

Dropping the ray count from 4 to 3 provides an immediate 15% performance uplift while remaining visually clean when paired with the 0.33 denoiser.

The shader can identify bright, emissive textures on your screen—such as neon signs, lightsabers, or glowing magical spells—and turn them into actual physical light sources that illuminate the surrounding geometry dynamically. Step-by-Step Installation Guide

Being a screen-space effect (SSGI), RTGI 0.33 is not "true" ray tracing in the sense of a fully path-traced game engine, but it is a sophisticated approximation that can be labeled as a form of ray tracing. The core technical limitation is screen-space: RTGI cannot account for light sources, geometry, or reflections that exist off-screen. If you look away from a light source and then back, the lighting may need a second to "recalculate," potentially causing a subtle flicker or shift. reshade ray tracing shader rtgi 033

But when it works? You’ll find yourself just looking at walls. Admiring how light finally behaves like light. And for $0 and an hour of setup, that’s a pretty good deal.

[Diffuse Global Illumination] --> Light carries physical color properties as it bounces [Ambient Occlusion (SSAO+)] --> True-to-life micro-shadowing in cracks and corners [Emissive Light Tracking] --> In-game magical/neon effects project real luminance

ReShade RTGI 0.33 is a specific version of the Ray Traced Global Illumination The shader works by analyzing the depth map

When prompted to select effect packages, check and SweetFX , then complete the installation. Step 2: Add the RTGI 0.33 Shader

Are you encountering any specific ?

In the preprocessor settings, set RT_RENDER_SCALE to 0.5 . This forces the shader to calculate ray tracing at half your native resolution, drastically improving FPS with minimal loss in lighting accuracy. The shader can identify bright, emissive textures on

One RTGI 0.33‑specific tip: use resolution if you are struggling with low frame rates. The quality difference is subtle in motion, but the performance gain can be dramatic.

The RTGI shader was created by developer Pascal Gilcher, known online as . Gilcher’s Screen‑Space Ray Traced Global Illumination (SSRTGI) debuted in May 2019 and quickly became a staple of graphics‑enhancement packs. The effect became so popular that Nvidia even incorporated a version of it into GeForce Experience’s Freestyle suite.