Choose the rendering API your game uses (DirectX 9, DirectX 11, DirectX 12, or Vulkan).
: A public collection of free ray-tracing presets and shaders available on GitHub .
Accurately models both diffuse (soft, scattered light) and specular (shiny, reflective) global illumination for improved material realism. Scalable Controls:
The image appears to shimmer, has dots (noise), or flashes.
You don’t need an RTX 4090 to enjoy bounce lighting. You just need RTGI 0.33, a spare afternoon, and a game you love.
Using this data, the shader reconstructs a rough 3D representation of the visible screen. It then casts virtual rays from every pixel. When a ray hits another surface in the depth buffer, it calculates how light should bounce, creating the "Global Illumination" effect.
Ensure your game's in-game Anti-Aliasing (MSAA) is turned completely off. MSAA often bugs out or blocks the ReShade depth buffer. Optimizing RTGI 0.33 Settings
The Ultimate Guide to ReShade Ray Tracing: How to Get RTGI 0.33
The main quality/performance balance hinges on three key sliders:
It utilizes the game’s depth buffer—the data that tells the computer how far away objects are from the camera—to simulate how light reflects, bounces, and casts shadows.
For beginners, a good strategy is to find and apply a pre-made preset created by another user for a similar game. These provide an excellent, often performance-balanced starting point. Search Nexus Mods or other modding communities for presets that include RTGI.
