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.
This report evaluates the ReShade RTGI (Ray Traced Global Illumination) shader version 0.33, released in 2021 by developer Pascal "Marty McFly" Gilcher. Unlike hardware-accelerated ray tracing (DirectX Raytracing – DXR), this shader implements a screen-space ray marching algorithm within the ReShade post-processing framework.
The key finding: v0.33 represents a mature but performance-intensive solution that simulates indirect lighting and ambient occlusion. It is not true ray tracing (no BVH structures, no geometry beyond the depth buffer), but a sophisticated screen-space effect. It provides significant visual enhancement for pre-2018 games lacking native RT support, but suffers from classic screen-space artifacts (missing data at screen edges, occlusion behind camera).
The search for "reshade ray tracing shader rtgi 033 2021" represents a specific moment in PC gaming history—a time when software ingenuity bridged the gap caused by hardware shortages. Pascal Gilcher didn't just make a filter; he made global illumination accessible to the GTX 1060, the most popular GPU on the Steam Hardware Survey for years.
If you are installing this today, you aren't installing the "latest and greatest." You are installing the reliable classic. It won't melt your GPU, it won't require an upgrade, and it will make your old games look like you remember them—with light that feels alive.
Ready to install? Fire up ReShade, drop in the 0.33 RTGI shader, and watch your shadows come to life.
Have a specific game in mind? Leave a comment with your title, and we will give you the exact RTGI 0.33 tuning preset for 2021 aesthetics.
In 2021, the ReShade RTGI (Ray Traced Global Illumination) shader, developed by Pascal Gilcher (Marty McFly), was a transformative post-processing tool that brought advanced lighting effects to games without native ray tracing support. Version
, released as part of the broader 2021–2022 update cycle, introduced critical features that improved both visual fidelity and usability. marty's mods Key Features of RTGI 0.33 Motion Vector Support
: One of the most significant additions in version 0.33 was the integration of motion vectors
. This allowed the shader to track object movement between frames, significantly reducing "ghosting" or trailing artifacts common in previous versions when the camera or objects moved quickly. Ray Traced Global Illumination (RTGI)
: The core feature simulates how light bounces off surfaces, picking up colors and casting them onto surrounding objects. This adds a level of depth and realism to older titles that typically rely on static, pre-computed lighting. Infinite Ray Length Multiplier
: Enhanced in the 2021 updates, this allowed the ray tracing to reach further into the scene, improving the accuracy of long-distance shadows and ambient occlusion. Image-Based Lighting (IBL)
: This feature uses the screen's existing image to inform the ray tracing calculations, helping the added lighting feel more cohesive with the game's native art style. Hardware Independence
: Unlike native RTX ray tracing, RTGI 0.33 does not require dedicated RT cores; it runs on standard GPU compute power, making it compatible with older hardware, including non-RTX cards like the Zotac NVIDIA GTX 1660 Performance and Setup Requirements
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
: 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
If you want to breathe new life into older games, Pascal Gilcher’s Ray Traced Global Illumination (RTGI) shader for ReShade is the gold standard. Version 0.33, released in 2021, remains a milestone for its balance of performance and visual fidelity.
Here is a blog post you can use to break down how it works and why it’s a game-changer.
Elevate Your Visuals: A Deep Dive into ReShade RTGI 0.33 (2021)
Ray tracing used to be reserved for high-end GPUs and modern titles. However, thanks to Pascal Gilcher’s RTGI shader for ReShade, players have been able to inject path-traced lighting into almost any game with a depth buffer.
The 0.33 update from 2021 stands out as a definitive version that optimized the experience for the average gamer. Here is everything you need to know about this iconic shader. 💡 What is RTGI?
RTGI stands for Ray Traced Global Illumination. Unlike standard game lighting, which often "fakes" how light bounces, RTGI calculates how light hits surfaces and reflects back into the environment. Realistic Shadows: Objects feel grounded in the world.
Color Bleeding: A red rug will subtly reflect red light onto nearby white walls.
Ambient Occlusion: Drastically improved contact shadows in corners and crevices. 🚀 What Made Version 0.33 Special?
While newer versions exist, the 0.33 release was a massive leap forward in 2021 for several reasons:
Improved Denoising: One of the biggest hurdles in ray tracing is "noise" (grainy artifacts). 0.33 introduced cleaner filters, making the image look stable even at lower ray counts.
Performance Optimization: This version refined the "Infinite Bounces" logic, allowing for more realistic light behavior without tanking your FPS.
UI Enhancements: More intuitive sliders for "Ray Length" and "Amount" made it easier for beginners to tune the look without a degree in lighting physics. 🛠️ How to Get the Best Results To make the most of RTGI 0.33, keep these tips in mind:
Check Depth Buffer Access: Ensure ReShade has access to your game’s depth buffer (disable MSAA in-game).
Balance the Rays: You don’t need 20 rays for a good look. Often 3–5 rays with a high-quality denoiser will look better and run faster.
Adjust Ray Length: If your shadows look "floaty," decrease the ray length. If the lighting feels too local, increase it. 🎮 Final Verdict
Even years later, the ReShade RTGI 0.33 shader is a must-have tool for virtual photographers and gamers looking to remaster their favorite classics. It bridges the gap between old-school rendering and the next generation of graphics. If you'd like to get this set up, let me know: What specific game are you trying to mod? What GPU are you currently running? Are you seeing any flickering or black screens?
The RTGI 0.3.3 shader can significantly enhance the visual fidelity of supported games and applications. Users can experience:
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.
RTGI is a shader module for ReShade, a generic post-processing injector for games and video software. Unlike standard reshade shaders that rely on depth buffers for basic ambient occlusion (SSAO), RTGI attempts to simulate the physical behavior of light. It calculates how light bounces off surfaces and colors the surrounding environment.
In 2021, v0.33 was the public iteration that solidified the "Marty McFly" (Pascal Gilcher) lighting formula. It brought features that mimicked the global illumination found in engines like Unreal Engine 5 or NVIDIA’s RTX implementations, but through a software layer that works on almost any GPU.
| Aspect | RTGI v0.33 | DXR / Vulkan RT (2021) | |--------|------------|-------------------------| | Hardware acceleration | No | Yes (RT cores) | | Scene data | Depth + normal buffer only | Full BVH + geometry | | Off-screen rays | No | Yes | | Multi-bounce | 1 (simulated) | Unlimited (physically based) | | Transparency/Reflections | No | Yes | | Cost | Free (shader mod) | $300+ GPU required |
