Reshade’s RTGI 0.33 shader represents a significant step forward in the modding community’s ongoing effort to bring more realistic lighting to games that lack native ray tracing. RTGI (Ray-Traced Global Illumination) is designed to approximate complex light transport — indirect lighting, color bleeding, soft interreflections, and subtle occlusion — by using screen-space techniques and clever temporal accumulation rather than full hardware ray tracing. Version 0.33 refines that approach, balancing visual fidelity, performance, and compatibility for a wide range of titles and systems.
Principles and goals
What changed in 0.33
Visual impact
User controls and tuning RTGI exposes several useful parameters:
Practical considerations
Conclusion RTGI 0.33 is a thoughtful incremental update that improves visual quality and stability while remaining practical for many users. It delivers richer indirect lighting through smart sample management, better temporal handling, and refined denoising — all without requiring hardware ray tracing. For players seeking a notable boost in realism with configurable performance options, RTGI 0.33 is a strong choice that demonstrates how screen-space GI techniques can meaningfully elevate the look of older and newer games alike.
The RTGI (Ray Traced Global Illumination) shader by Pascal Gilcher (Marty McFly) is a post-processing tool for ReShade that simulates path-traced lighting, shadows, and ambient occlusion in almost any DX9, DX11, DX12, or Vulkan game.
As of version 0.33, the shader has been optimized for better performance and includes specialized features like infinite bounces and advanced denoising. 1. Requirements & Prerequisites
Before installing, ensure your system and game meet these criteria:
Access to the Shader: RTGI is a paid shader available through Marty McFly’s Patreon. Download the latest version (0.33 or newer).
Depth Buffer Access: The shader requires access to the game's "Depth Buffer" to know where objects are in 3D space.
Note: Depth access is usually disabled in online multiplayer games to prevent cheating.
ReShade: Download the latest version from the official ReShade website. 2. Installation Steps
Install ReShade: Run the ReShade installer, select your game's .exe, and choose the correct API (usually DirectX 11 or 12). When asked to select effect packages, ensure "Addon" support is enabled if you are playing a single-player game (this helps with depth buffer detection). Add RTGI Files: Open your game's installation folder (where the .exe is). Find the reshade-shaders folder. Copy the RTGI.fx file into the Shaders subfolder.
Copy the RTGI folder (containing textures/headers) into the Textures subfolder. Launch the Game: Press Home to open the ReShade overlay. 3. Configuring the Depth Buffer
If the lighting looks "broken" or follows your camera, you must fix the depth buffer: Go to the Add-ons tab in ReShade. Check the box that matches your game's resolution.
In the Edit Global Processor Definitions (Home tab), ensure:
RESHADE_DEPTH_INPUT_IS_REVERSED is set to 1 or 0 (try both until it looks right). RESHADE_DEPTH_INPUT_IS_UPSIDE_DOWN is usually 0. 4. Tuning RTGI 0.33 Settings
Once active, adjust these key parameters in the ReShade menu:
Ray Length: Controls how far the light travels. High values create large, soft shadows; low values create tight ambient occlusion.
Ray Amount: Higher values reduce "noise" but significantly impact FPS.
Infinite Bounces: A feature in newer versions that allows light to bounce multiple times, creating much more realistic interior lighting.
Denoising: Ensure the denoiser is active to smooth out the graininess inherent in real-time ray tracing. 5. Common Troubleshooting
Flickering Lighting: Usually caused by a "temporal" setting in the game (like TAA). Try disabling the game's native Anti-Aliasing.
Shader is Invisible: Ensure the depth buffer is working. Use the DisplayDepth.fx shader to check; if the screen is solid black or white, RTGI cannot "see" the 3D world.
Performance Hits: RTGI is very demanding. If your FPS drops too low, reduce the Resolution Scale within the RTGI settings to 0.5 or 0.67.
The Reshade Ray Tracing Global Illumination (RTGI) shader, specifically version 0.33, represents a landmark in post-processing technology. Developed by Pascal Gilcher (Marty McFly), this shader bypasses the need for native hardware support or engine-level integration to bring sophisticated lighting techniques to older and non-native titles. The Mechanics of Screen-Space Ray Tracing
Unlike "true" hardware ray tracing (DHRT) found in modern GPUs, RTGI 0.33 operates in Screen Space. It utilizes the game’s depth buffer to calculate how light bounces off visible geometry. Version 0.33 introduced significant optimizations in how these "rays" are cast and denoised, allowing for realistic light "bleeding"—where a red carpet subtly reflects a warm glow onto a nearby white wall. Key Innovations in Version 0.33 Reshade Ray Tracing shader RTGI 0.33
Improved Denoising: One of the greatest hurdles in real-time ray tracing is "noise" or graininess. RTGI 0.33 refined the temporal filters, ensuring that lighting remains stable even during fast camera movement.
Infinite Bounces (Approximated): While calculating infinite light bounces is computationally impossible for a post-process shader, 0.33 uses clever math to simulate secondary and tertiary bounces, creating deep, natural shadows in corners (Ambient Occlusion) that standard shaders miss.
Material Awareness: This version improved how the shader interacts with different surface types, allowing for a better distinction between matte and glossy surfaces, which prevents the "plastic" look common in earlier versions. Impact on the Gaming Community
The primary appeal of RTGI 0.33 is its universality. It allows players to "remaster" classic titles like Skyrim, Batman: Arkham City, or The Witcher 3 with lighting that rivals modern releases. Because it is an injector-based tool, it provides a bridge for gamers who have capable GPUs but play titles that were developed before the ray-tracing era. Limitations and Conclusion
Despite its brilliance, RTGI 0.33 is limited by what the camera can see. Since it relies on screen-space data, light sources or objects behind the player’s field of view do not contribute to the scene’s lighting. Furthermore, it carries a significant performance cost, often requiring high-end hardware to maintain a fluid frame rate.
Ultimately, RTGI 0.33 is more than just a visual mod; it is a testament to the power of community-driven software, proving that sophisticated lighting physics can be democratized and applied to the vast library of gaming history.
Unlocking Stunning Visuals: A Deep Dive into ReShade Ray Tracing Shader RTGI 0.33
The world of computer graphics has witnessed tremendous growth over the years, with developers and gamers alike pushing the boundaries of visual fidelity. One of the most significant advancements in recent times is the integration of ray tracing technology into real-time rendering. ReShade, a popular post-processing injector, has been at the forefront of this revolution, offering users a wide range of shaders to enhance their gaming experiences. In this article, we'll be exploring the ReShade Ray Tracing shader RTGI 0.33, a cutting-edge tool that's changing the way we experience graphics.
What is ReShade?
For the uninitiated, ReShade is a free, open-source post-processing injector that allows users to enhance their games with various shaders. It works by injecting a custom DLL into the game's process, enabling the application of custom effects. ReShade supports a wide range of shaders, from simple FXAA (Fast Approximate Anti-Aliasing) to complex ray tracing and global illumination.
What is Ray Tracing?
Ray tracing is a rendering technique that simulates the way light behaves in the real world. It works by tracing the path of light as it bounces off various objects in a scene, creating a more accurate and realistic representation of the environment. This technology has been a holy grail for graphics enthusiasts, as it enables the creation of stunning visuals with unprecedented levels of detail and realism.
Introducing RTGI 0.33
RTGI (Real-Time Global Illumination) 0.33 is a ReShade shader that leverages the power of ray tracing to bring global illumination to games in real-time. Developed by a team of enthusiasts, this shader aims to provide a more immersive gaming experience by accurately simulating the way light interacts with the environment.
Key Features of RTGI 0.33
So, what makes RTGI 0.33 so special? Here are some of its key features:
How Does RTGI 0.33 Work?
So, how does RTGI 0.33 manage to achieve such impressive results? Here's a simplified overview of the process:
Performance Impact
One of the primary concerns with any graphics enhancement is performance impact. RTGI 0.33 is designed to be relatively lightweight, with a performance impact that's manageable on modern hardware. However, it's essential to note that the shader's performance will vary depending on factors like system specifications, game complexity, and settings.
Conclusion
ReShade Ray Tracing shader RTGI 0.33 is a groundbreaking tool that's pushing the boundaries of real-time graphics. By leveraging the power of ray tracing and global illumination, this shader provides an unparalleled level of visual fidelity, transforming the way we experience games. Whether you're a gamer, developer, or simply a graphics enthusiast, RTGI 0.33 is an essential tool to explore.
Getting Started
If you're interested in trying out RTGI 0.33, here's a step-by-step guide to get you started:
Future Developments
The world of ray tracing and global illumination is rapidly evolving, with new technologies and techniques emerging regularly. As developers continue to push the boundaries of what's possible, we can expect even more impressive advancements in the field. Some potential future developments for RTGI include:
Conclusion
ReShade Ray Tracing shader RTGI 0.33 is a remarkable achievement in the world of computer graphics. By bringing real-time ray tracing and global illumination to games, this shader has opened up new possibilities for visual fidelity and immersion. As the technology continues to evolve, we can expect even more stunning visuals and innovative applications. Whether you're a gamer, developer, or simply a graphics enthusiast, RTGI 0.33 is an essential tool to explore. Reshade’s RTGI 0
Reshade Ray Tracing (RTGI) version 0.33, developed by Pascal Gilcher (Marty McFly), represents a significant milestone in post-processing graphics. Unlike native hardware ray tracing, RTGI works at the screen-space level to simulate realistic lighting, shadows, and reflections in almost any 3D game. ⚡ Core Features of RTGI 0.33 Path Traced Global Illumination:
Simulates how light bounces off surfaces to illuminate dark corners naturally. Ambient Occlusion: Provides deep, accurate contact shadows where objects meet. Infinite Bounces:
Version 0.33 refined the "multi-bounce" logic to make lighting look softer and more realistic. Advanced Denoising:
Features a sophisticated spatio-temporal filter to remove "noise" without excessive blurring. Depth-Aware:
Uses the game's depth buffer to ensure light interacts correctly with 3D geometry. 🛠️ Key Technical Requirements
To run RTGI 0.33 effectively, your setup must meet these criteria: Reshade Installed:
You need a recent version of Reshade (Addon version recommended for depth buffer access). Depth Buffer Access:
The game must allow Reshade to access depth data (often requires disabling in-game Anti-Aliasing/MSAA). GPU Power:
While it runs on non-RTX cards (GTX, Radeon), it is extremely demanding on frame rates. Shader Connectivity: Requires the framework to be present in your shaders folder. 📉 Version 0.33 Improvements
Compared to earlier iterations, 0.33 introduced specific refinements: Reduced Ghosting:
Improved temporal accumulation means moving objects leave fewer "trails" in the lighting. Better Material Detection:
Improved handling of "roughness" and "specular" values for more accurate light behavior. UI Optimization:
More intuitive slider ranges for "Ray Length" and "Z-Thickness" to prevent light leaking through walls. ⚠️ Known Limitations Screen Space Only:
It cannot "see" what is behind the camera or off-screen. Lighting may disappear at the screen edges.
In many games, the shader might apply lighting over the HUD or menus if not masked properly. Performance Hit:
Expect a 20% to 50% drop in FPS depending on your resolution and ray count. 🚀 How to Optimize Performance Lower Ray Count:
Keep "Ray Amount" between 3 and 5 for a balance of quality and speed. Step Size:
Increase "Ray Step Size" to cover more ground with fewer calculations. Resolution Scale:
Use the "Next Gen" internal scaling options if available to render the GI at a lower resolution than the game. What is your Are you seeing any specific issues like flickering black screens I can provide a custom settings guide tailored to your specific hardware.
The RTGI 0.33 shader (Ray Traced Global Illumination), developed by Pascal Gilcher (known as Marty McFly), represents a pivotal moment in the democratization of advanced rendering techniques for legacy and modern video games. By utilizing the ReShade post-processing framework to inject sophisticated lighting calculations into a game’s rendering pipeline, RTGI 0.33 effectively bridges the gap between traditional rasterization and modern hardware-accelerated ray tracing. The Technical Evolution of 0.33
Version 0.33, released in August 2022 alongside ReShade 5.3, introduced critical advancements that moved the shader beyond mere "screen-space effects" toward a more stable and visually coherent experience.
Motion Vectors: The hallmark feature of 0.33 was the integration of motion vectors. Previous versions often suffered from "ghosting"—visual trails left behind moving objects—because the shader didn't understand how pixels moved from one frame to the next. By utilizing motion vectors, RTGI 0.33 significantly reduced these artifacts, allowing the ray-traced light to "stick" to moving geometry more accurately.
Depth-Buffer Integration: Like its predecessors, RTGI 0.33 functions by "scraping" a game's depth buffer to understand the 3D structure of a scene. It then shoots virtual rays within that space to calculate how light should bounce off surfaces.
SSRTGI (Screen Space Ray Traced Global Illumination): While often marketed as "Ray Tracing," it is technically a screen-space technique. It can only calculate lighting for objects currently visible on your screen. If a light source is behind the camera, its effects won't be calculated, which is the primary limitation compared to "native" ray tracing. Artistic Impact and Immersion
The primary goal of the RTGI shader is to simulate diffuse global illumination and ambient occlusion. In practical terms, this transforms the atmosphere of older titles:
Light Bouncing: Instead of light just hitting a floor and stopping, RTGI allows that light to reflect back up onto the ceiling and walls, filling shadows with color and warmth.
Grounded Objects: It provides "micro-shadows" where objects meet the ground, preventing the "floating" look common in games with poor ambient occlusion.
Color Bleeding: If a character stands next to a bright red wall, their clothing will subtly pick up a red tint, mimicking the physical behavior of light in the real world. Performance vs. Visual Fidelity ReShade 5.3 and RTGI 0.33 Update | August 2022 What changed in 0
The ReShade RTGI 0.33 update, released by Pascal Gilcher (Marty McFly) in August 2022, serves as a significant technical bridge between standard screen-space effects and full ray tracing. Technical Summary
The RTGI (Ray Traced Global Illumination) shader is a post-processing tool that adds dynamic, realistic lighting to games by simulating the way light bounces off surfaces. Version 0.33 was a major milestone, appearing after an 18-month development gap. Key Features in v0.33
Motion Vectors Support: This addition significantly improves temporal stability, reducing the flickering or "ghosting" artifacts often seen in moving scenes.
Diffuse and Specular GI: RTGI accurately models both diffuse (soft, matte) and specular (shiny, reflective) global illumination.
Hardware Independence: Unlike official RTX implementations, RTGI works on non-RTX video cards, including older GTX series (10xx and 16xx), because it operates using depth data rather than dedicated ray-tracing hardware.
Compatibility: It supports nearly all modern APIs, including DirectX 9, 10, 11, 12, OpenGL, and Vulkan. Performance Impact
Ray tracing, even when emulated through ReShade, is highly demanding:
Frame Rate Cost: Users often report significant performance hits. For example, a GTX 1080 Ti may see frame rates drop from ~110 FPS to ~70 FPS when RTGI is active.
Optimization: You can mitigate the performance cost by enabling "half-resolution" settings within the RTGI menu or decreasing the "ray amount". Installation Requirements ReShade Tutorial | How to use the RTGI Shader (0.25+)
You cannot just toggle RTGI 0.33 on and expect miracles. The default settings are usually too aggressive. Use this tuning matrix for 60 FPS gameplay on an RTX 3060 / RX 5700 XT.
| Setting | Low Impact (60 FPS) | High Quality (30 FPS) | Explanation | | :--- | :--- | :--- | :--- | | Ray Length | 0.10 - 0.15 | 0.25 - 0.40 | How far light bounces. Longer = more bounce, but more noise. | | Ray Count | 2 - 3 | 6 - 8 | The killer setting. Keep at 2 for 1080p. Raise to 4 for 1440p. | | Bounces | 1 | 2 | Secondary bounces. For 0.33, stick to 1 unless on a 4090. | | TAA Strength | 0.85 | 0.70 | Higher TAA reduces flicker but adds ghosting. 0.85 is safe. | | Intensity | 1.0 | 1.5 | General brightness of the bounced light. |
Critical Bug Warning: If you see "boiling" white noise on faces or walls, reduce your "Ray Count" and increase "TAA Strength" . If you see inverted shadows (light inside dark corners), your depth buffer is reversed—toggle RESHADE_DEPTH_INPUT_IS_REVERSED in the preprocessor definitions.
This is invisible but massive. The shader now better detects edges between far and near geometry, reducing that classic “light leak” around door frames and character shoulders. Not gone entirely (impossible in screen space), but much better.
ReShade RTGI 0.33 is not a replacement for native hardware-accelerated Path Tracing. But it doesn't need to be.
It is the ultimate "what if" machine. What if Assassin’s Creed: Unity had modern denoising? What if The Witcher 3 (pre-next-gen update) had bounce lighting? What if Mirror’s Edge Catalyst actually looked like the concept art?
With version 0.33, Marty McFly has proven that software ray tracing is not dead; it is just getting mature. If you haven't looked at ReShade in a year, go update your preset. The grain is gone. The future (of modding) is bright.
Ready to try it? You can find the shader on Marty McFly’s Patreon (usually free after a short exclusivity period) or via the ReShade Discord server. Pair it with qUINT_ssr for reflections and MXAO for ambient occlusion, and you won't recognize your old games.
Have you tried RTGI 0.33? What game did you test it on first? Let us know in the comments.
Ray Traced Global Illumination (RTGI) shader, developed by Pascal Gilcher (Marty McFly), is a sophisticated post-processing effect for ReShade that simulates real-time global illumination and ambient occlusion in almost any game. Unlike native ray tracing, it operates in screen space by tracing rays against the game's depth buffer, making it compatible with non-RTX GPUs. Key Features of RTGI 0.33
Released around August 2022, version 0.33 introduced several significant technical improvements: Motion Vectors Integration
: This was the standout feature for 0.33, allowing the shader to track movement between frames. This drastically improves temporal stability, reducing the flickering and "ghosting" artifacts common in earlier screen-space solutions. Enhanced Denoising
: Utilizing motion data enables more effective denoising, resulting in smoother lighting transitions and cleaner shadows. Hardware Independence
: It continues to work across a wide range of hardware, though it is demanding on performance due to the complexity of the calculations. Visual and Performance Impact Realistic Lighting
: RTGI physically simulates light bounces, adding depth to scenes that otherwise look "flat". It adds subtle glow beneath light sources (like portals in ) and accurate shadows at material edges. Performance Cost
: While more efficient than early versions (which could drop FPS from 60 to 15), RTGI is still resource-intensive and can significantly impact frame rates depending on the game and settings. Depth Buffer Requirement
: The shader requires a properly configured depth buffer to work. Users must often manually adjust settings like RESHADE_DEPTH_INPUT_IS_INVERTED RESHADE_DEPTH_INPUT_IS_LOGARITHMIC to ensure the shader "sees" the game world correctly. How to Access and Install The RTGI shader is distributed through the Marty's Mods Patreon
, typically requiring a "Breakfast" tier membership ($5) or higher for beta access. Portal Reshade RTGI - The Working Class' RTX Portal
