The RTGI (Real-Time Global Illumination) shader, version 0.3.3, developed for use with Reshade, represents a significant advancement in real-time lighting technology for games and interactive applications. Released in 2021, this shader leverages the power of ray tracing, a rendering technique that accurately simulates the way light behaves in the real world, creating more immersive and visually stunning experiences.
ReShade is a generic post-processing injector for Windows games. It allows developers and modders to write custom shaders that hook into a game’s rendering pipeline after the frame is drawn.
RTGI (Ray Traced Global Illumination) is a specific shader developed by Marty McFly. Unlike simple color grading or ambient occlusion (AO) shaders, RTGI simulates how light bounces off surfaces to create realistic indirect lighting and shadows.
Before 2021, most "fake ray tracing" shaders were simply screen-space reflections. RTGI 0.33 changed the game by implementing a hybrid approach: screen-space ray marching combined with depth buffer information to create plausible light bounces.
RTGI 0.33 works by analyzing a single frame of a game (the depth buffer and color buffer) and tracing rays in screen-space. It asks: "Where is light bouncing from the pixels I can see?"
Because it cannot see around corners (no BVH structures like RTX cards), it sometimes fails, causing "light leaks" or missing reflections. However, in 2021, version 0.33 introduced a critical improvement: Temporal Stability. Older versions flickered wildly. Version 0.33 smoothed out the noise, making it feel shockingly close to hardware ray tracing.
Without RTGI, Los Santos looks flat. With version 0.33, the neon lights bounce off wet pavement. The temporal stability fixed the awful ghosting of older RTGI versions on car windows.
ReShade RTGI 0.33 proved that ray tracing’s visual appeal – soft shadows, color bleeding, and ambient occlusion – could be approximated without specialized hardware or engine support. For budget PC gamers and retro-modding enthusiasts in 2021, it turned old favorites into something that looked almost next-gen. And while modern games have since integrated hardware RT widely, RTGI 0.33 stands as a testament to what a single dedicated developer can achieve with clever screen-space algorithms and an open-source injection framework.
“It’s not real ray tracing, but on a 2016 GTX 1060 in 2021, it feels like magic.” – Reddit r/pcgaming user, March 2021
Want to try RTGI 0.33 today? Download ReShade 4.9.1 (or newer), search for “RTGI” in the shader repository, or find the .fx file from community backups. Expect 30–50% performance cost, but the visual upgrade in games like Fallout: New Vegas or Bioshock Infinite is remarkable.
ReShade Ray Tracing: Unlocking Next-Gen Visuals with RTGI 0.33 (2021)
The year 2021 was a transformative era for PC gaming graphics, largely due to the widespread adoption of the ReShade Ray Traced Global Illumination (RTGI) shader. Developed by Pascal Gilcher (also known as Marty McFly), the RTGI shader version 0.33 represented a pinnacle of post-processing technology, allowing gamers to inject sophisticated lighting effects into almost any title—even those released long before the hardware ray tracing era. What is the RTGI Shader?
The ReShade RTGI shader is a post-processing effect that simulates Ray Traced Global Illumination. Unlike traditional baked lighting, RTGI facilitates real-time interactive "bounce lighting," where light reflects off surfaces to illuminate areas not directly hit by a primary light source. Key benefits of the 0.33 version include: reshade ray tracing shader rtgi 033 2021
Dynamic Lighting: Adds realistic shadow casting and material interaction that adapts to the in-game environment.
Hardware Independence: Unlike native RTX implementations, RTGI operates solely on depth data, making it compatible with non-RTX video cards.
Temporal Stability: Minimized flickering and lag, providing a smoother visual experience compared to earlier versions.
Motion Vectors: One of the most significant updates in the 0.33 release was the addition of motion vectors, which drastically improved the accuracy of lighting during fast movement. Key Features of Version 0.33 (2021)
The 2021 release of RTGI 0.33 brought several refinements that bridged the gap between offline rendered images and real-time gaming.
Enhanced Denoising: Improved algorithms to reduce the "noise" often associated with ray tracing, leading to a cleaner image.
Immersive Launchpad Integration: Best used with the "Launchpad" pre-pass shader, which provides motion estimation using optical flow for more precise lighting updates.
Specular Global Illumination: Accurate modeling of both diffuse and specular light, ensuring that shiny surfaces reflect the environment correctly. How to Install and Optimize RTGI 0.33
Using RTGI requires a standard ReShade installation and access to Pascal Gilcher's shader files.
The RTGI (Ray Traced Global Illumination) shader v0.33, created by Marty McFly (Pascal Gilcher), is a post-processing effect that simulates how light bounces off surfaces in real-time. Version 0.33 was a significant 2022 update that added motion vectors to improve temporal stability. 🛠️ Installation Guide
To use RTGI, you must have the base ReShade tool installed first.
Download RTGI: Access the shader through Marty McFly's Patreon (typically the $5 tier). The RTGI (Real-Time Global Illumination) shader, version 0
Locate Game Folder: Open the directory where your game’s .exe is located. Place Files: Open the reshade-shaders folder in your game directory.
Drag the contents of the RTGI Shaders folder into the game's Shaders folder.
Drag the contents of the RTGI Textures folder into the game's Textures folder.
Launch Game: Press the Home key to open the ReShade menu in-game. 🔍 Critical Step: Depth Buffer Setup
RTGI requires access to the game’s "depth" (the distance of objects from the camera) to calculate where light hits.
Disable In-game Effects: Turn off Anti-Aliasing (MSAA) and Motion Blur in the game's settings, as these often break the depth buffer.
Verify Depth: Enable the DisplayDepth shader in ReShade. You should see a clear grayscale image (left) and a "normal map" (right).
Fixing Issues: If the screen is blank, go to the Add-ons (or DX11/DX12) tab in ReShade and try checking different depth buffers until the image appears. ⚙️ Best Settings for v0.33
Once depth is working, find RTGI in the shader list and adjust these key parameters for the best balance: Recommendation Ray Amount 3 (Performance) to 5 (Quality) Higher = less noise but lower FPS Ray Step Amount Higher = more accurate and defined light bounces GI Resolution 0.5 (Half) or 1.0 (Full) Use 0.5 if your frame rate is struggling Spatial Filter Essential for denoising and smoothing the lighting
💡 Pro Tip: Enable Performance Mode at the bottom right of the ReShade menu after you finish tweaking settings to save a few frames. ReShade 5.3 and RTGI 0.33 Update | August 2022
ReShade RTGI (Ray Traced Global Illumination) shader, developed by Pascal Gilcher (also known as Marty McFly), is a post-processing tool designed to add realistic lighting effects to video games that do not natively support hardware-level ray tracing. marty's mods Key Features of RTGI 0.33 (2021-2022)
Released during the 2021–2022 period as a significant update, version 0.33 introduced technical improvements to enhance both visual quality and performance: Motion Vector Support RTGI 0
: One of the most critical additions in version 0.33 was the integration of motion vectors
. This allows the shader to track object movement across frames, significantly reducing the "ghosting" or trailing artifacts common in previous screen-space ray tracing implementations. Improved Global Illumination
: The shader simulates how light bounces off surfaces, allowing colors from a bright object to "bleed" onto nearby geometry, creating a more cohesive and immersive scene. Hardware Agnostic
: Unlike native NVIDIA RTX or AMD Ray Tracing solutions, RTGI works on almost any GPU (including older cards) because it is a screen-space effect
that traces rays against the game's depth buffer rather than actual 3D geometry. Integration with NVIDIA
: The technology behind Pascal Gilcher's RTGI was influential enough to be officially adopted by NVIDIA into their FreeStyle and Ansel
drivers as "SSRTGI" (Screen Space Ray Traced Global Illumination). How It Works ReShade 5.3 and RTGI 0.33 Update | August 2022
Based on the title provided, you are referring to a specific early access release of the RTGI (Ray Traced Global Illumination) shader by developer Pascal Gilcher (also known as Marty McFly).
This specific version—v0.33 released in 2021—is a significant milestone in the world of real-time post-processing for games. Here is a breakdown, analysis, and guide regarding this piece of software.
ENB presets are heavy. RTGI 0.33 combined with a simple weather mod (Cathedral) produced physically based lighting that Bethesda never coded. Caves actually became dark, and torches illuminated realistically.
How does the 2021 build hold up against today's "Martyan" or "qUINT" shaders?
For most retro-fitting, version 0.33 remains the best "entry level" ray tracing mod. It hits the sweet spot of visual impact versus computational cost.
Installing the reshade ray tracing shader rtgi 033 2021 on your Windows PC required careful file management. Here is the canonical method used by thousands of modders: