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Reshade RTGI 0.33 — Quick Guide & Download Notes

What it is

RTGI (Ray-Traced Global Illumination) for ReShade is a shader pack that adds real-time global illumination and related lighting effects to games using ReShade. Version 0.33 is a specific release that many users seek for its stability and visual quality.

Why people use it

Improves scene lighting (indirect bounce light, softer ambient lighting).
Adds more realistic color bleeding and contact shadows.
Often provides a noticeable upgrade to atmosphere and depth without changing game assets.

Before you download or install

ReShade is required. Install the latest ReShade compatible with your game (directX/OpenGL/Vulkan) before adding RTGI.
Version compatibility: RTGI versions may depend on the ReShade runtime and GPU driver support (e.g., DX11/12, shader model features). Check that your GPU/drivers and ReShade runtime support the shader features used by RTGI 0.33.
Backup: Save your game config and any existing ReShade presets/shaders before adding new shaders.
Performance: RTGI is performance-costly—expect higher GPU usage and lower framerates. Use it on mid-to-high end hardware, and be prepared to tweak quality/performance settings.

Where to get it (safely)

Prefer official sources: the shader’s author page, the ReShade forum thread, or a reputable modding community (Nexus Mods, GitHub, or the official ReShade website) that hosts the release.
Verify files: download from an author-verified release page or tagged GitHub release to avoid modified or malicious builds.
Check version tags/releases (look specifically for "0.33") and read the release notes/changelog the author provides.

Installation highlights

Install ReShade into the game EXE if not already done; choose the correct graphics API.
Copy the RTGI shader files (usually a .fx or .h file plus any include files/textures) into your game's ReShade/shaders folder.
Add RTGI to the active preset via the ReShade overlay (Home key by default).
Load any accompanying preset (.ini) if provided by the author for the 0.33 release.
Adjust in-game and RTGI settings: start with low quality or performance presets, then increase samples, denoising, or resolution gradually.

Tuning for performance

Lower sample counts or resolution scale in RTGI settings.
Enable denoising options (if provided) rather than raw high sample counts.
Disable or reduce other expensive ReShade effects (ambient occlusion, SSAO, heavy bloom).
Use adaptive quality, if available, or set RTGI to run at reduced render resolution.

Troubleshooting common issues

Crashes or black screen: ensure ReShade is the correct API for the game; update GPU drivers; try a different ReShade version.
Extremely low FPS: reduce RTGI quality settings, or disable other heavy shaders.
Visual artifacts/noise: increase samples or enable denoising, but balance with performance.
Conflicts with other shaders: try loading RTGI alone to confirm, then reintroduce other effects one-by-one.

Safety & legality

Using ReShade and RTGI is generally allowed for single-player and local use, but some multiplayer games may consider client-side visual modifications as rule violations—check game policies and avoid use in multiplayer if prohibited.

Short story: Reshade RTGI 0.33 — The Download

Rain tracked down the cracked window of Juno's apartment like a slow, patient metronome. She sat hunched over her laptop, the glow from the screen turning her knuckles blue. The message board had been buzzing for days: RTGI 0.33 — a community-built ReShade preset that finally promised the cinematic light she’d been chasing in every playthrough.

She clicked the link. The download page was a patchwork of mirrors and warnings—old forum threads, a developer’s GitHub, a mirrored file host tucked behind a paywall. Someone in the comments said to trust the GitHub; someone else swore the dev had vanished after 0.32. Juno hesitated, thumb over the trackpad, then reminded herself of the rules she always followed: prioritize official sources, check signatures, and never run installers from unknown hosts.

She opened a terminal and typed: git clone https://github.com/rtgi/rtgi.git The repository pulled down like a small, breathing thing—commits, tags, a changelog that read like a logbook of careful steps. v0.33 — “improved global illumination, reduced noise, added temporal stability” — signed by a username she recognized from a Discord livestream months ago. The tag had a GPG signature. Relief warmed the back of her neck.

Still, she didn’t rush. The README instructed: compile from source or use the provided binaries, verify checksum. She ran shasum on the binary mirror, matched it to the hash in the repo, and let the validation finish. Every green check made the download feel less like theft and more like permission.

Installing was a negotiation. ReShade’s injector asked for DLLs, hooks, a little permission to sit between game and GPU. Juno breathed, imagining light rays scattering across virtual valleys—ambient occlusion softened at the edges, color bleeding like watercolor, sunlight pooling on moss with believable warmth. She placed the RTGI shader files into her ReShade folder, adjusted the preset ini, and launched the game.

The first frame made her lungs forget to move. Light bent and pooled in ways the vanilla engine never had. Particle effects shimmered with believable depth. But something else flickered—an artifact, a stubborn band of noise along the horizon. Not perfect. The changelog had warned: “edge cases remain with dynamic skies.” She spent the next hour toggling parameters, dialing temporal accumulation, nudging denoise thresholds until the horizon exhaled. Reshade RTGI 0

At 3:14 a.m., she took a screenshot and uploaded it to the forum, a single image with the caption: “v0.33 — worth the wait.” Replies exploded: praise, optimization tips, a patch from a user who’d found a fix for the horizon issue. Someone posted a video of a sunrise rendered with RTGI 0.33 and a simple note: “Do not redistribute binaries without permission.”

Juno leaned back. The rain had stopped. Outside, the city was a blur of sodium streetlights and reflections, not unlike the way RTGI had transformed the game’s world—more honest light, more truthful depth. The download hadn’t been just a file; it had been an entry into a tiny, living ecosystem of makers and fixers. She felt a small kinship with them, a shared obsession with chasing the way light tells a story.

She closed the laptop and let the image rest in her head: a valley, the sun just clearing the ridge, dust motes burning like distant stars. In the quiet that followed, she already knew: tomorrow she’d be back, tweaking, building—because once you start trying to capture light, you never stop chasing the way it makes things mean something.

In the pursuit of visual fidelity, lighting has always been the "holy grail" of computer graphics. Historically, real-time lighting in video games relied on "faked" techniques like pre-baked lightmaps or simple screen-space reflections. The introduction of RTGI 0.33, developed by Pascal Gilcher (widely known as Marty McFly), fundamentally changed this landscape by democratizing ray-traced global illumination. Bridging the Generational Gap

The primary triumph of RTGI 0.33 is its hardware independency. While modern "RTX" cards use dedicated hardware for ray tracing, RTGI utilizes a game's depth buffer to simulate how light physically interacts with objects. This allows users with older GPUs to experience advanced lighting effects—such as diffuse global illumination and ambient occlusion—that were previously reserved for high-end enthusiasts. Technical Milestones of Version 0.33

Version 0.33 is often cited as a turning point due to its refined stability and the introduction of motion vectors.

Motion Vectors: These allow the shader to track object movement across frames, significantly reducing "ghosting" or temporal artifacts that plagued earlier versions.

Temporal Stability: By modeling both diffuse and specular global illumination more accurately, this version minimized the flickering common in real-time post-processing shaders. The Culture of Modding and Accessibility

The distribution of RTGI is unique within the gaming world. While early versions and certain updates are often hosted on platforms like Marty's Mods or Pascal Gilcher’s Patreon, the community has archived specific versions like 0.33 for compatibility with specific game "presets". For instance, it is a staple in the Natural Vision Evolved mod for GTA 5, proving that post-processing can elevate a decade-old game to contemporary visual standards. Conclusion

ReShade RTGI 0.33 is more than just a graphical "filter." It is a testament to the power of community-driven engineering. By bridging the gap between offline-rendered quality and real-time performance, it has transformed how we perceive the longevity of digital worlds, proving that with the right shaders, any game can be "remastered" by its own players. ReShade 5.3 and RTGI 0.33 Update | August 2022

The primary feature of RTGI (Ray Traced Global Illumination) version 0.33, created by Pascal Gilcher (Marty McFly), is the introduction of spatial and temporal denoising improvements, which significantly reduce the "noise" or flickering often seen in real-time ray tracing. Key features and updates included in the 0.33 release are:

Improved Denoising: Version 0.33 refined the filter kernels to produce a cleaner image with fewer artifacts, especially in motion.

Performance Optimizations: This version included tweaks to the shader code to provide a more stable framerate compared to earlier alpha builds. RTGI (Ray-Traced Global Illumination) for ReShade is a

Infinite Bounces Emulation: It uses a specialized mathematical approach to simulate light bouncing multiple times within a scene, creating more realistic shadows and color bleeding without the massive performance hit of "true" multi-bounce tracing.

Z-Thickness Logic: Enhanced depth detection to prevent light from "leaking" through thin walls or objects, a common issue in screen-space effects. How to Download

RTGI is a paid shader and is not officially available for free. To download version 0.33 (or the latest version, which has since surpassed 0.33), you must: Visit Pascal Gilcher's Patreon.

Subscribe to a tier that offers access to the RTGI shader (typically the "Beta" or "Alpha" tiers).

Link your Discord or check the Patreon posts to find the direct download links for the shader files.

Note: Be cautious of "free" downloads of version 0.33 found on third-party sites, as these are often outdated, pirated, or may contain malware.

Performance Optimization (For Low-End PCs)

One reason version 0.33 remains popular is its efficiency. On an NVIDIA GTX 1060 or AMD RX 580, you can expect a drop of 5-15 FPS.

To reduce impact:

Lower Resolution Scale in RTGI settings from 0.5 to 0.25. This renders the effect at half resolution.
Set Bounce Count to 1.
Run the game in Borderless Fullscreen (ReShade interacts better with the Windows DWM).
Disable the game's built-in Ambient Occlusion (SSAO/HBAO) to avoid double-processing shadows.

3. Downloading RTGI v0.33 – Important Considerations

Abstract

ReShade RTGI (Ray Traced Global Illumination) v0.33 is a specific, now-obsolete version of a popular post-processing shader developed by Pascal "Marty McFly" Gilcher. This paper clarifies the nature of RTGI as an effect simulating ray-traced lighting, addresses the confusion surrounding version 0.33, provides guidance on legitimate download sources, and discusses the shift to newer, proprietary software (MMFX or ReLight).

Step-by-Step Installation Guide

Once you have the ReShade installer and the qUINT_rtgi.fx (v0.33) file, follow these instructions.

Step 1: Run the ReShade Installer

Click "Select game" and locate your game’s .exe file (e.g., Cyberpunk2077.exe, SkyrimSE.exe, Witcher3.exe).
Select DirectX 10/11/12 (most games) or Vulkan accordingly.
When asked to download shaders, skip this for now. We will use the manual file.

Step 2: Create the Shader Folder

Navigate to your game’s root directory. You will see a new file: dxgi.dll or opengl32.dll.
Create a new folder named reshade-shaders.
Inside that, create another folder named Shaders.

Step 3: Copy RTGI 0.33

Place your downloaded qUINT_rtgi.fx (v0.33) into the reshade-shaders\Shaders folder.
(Optional) ReShade may also ask for a Textures folder. Create an empty one to avoid errors.

Step 4: Launch the Game

Press the Home key (usually) to open the ReShade overlay.
Go to the "Settings" tab and ensure your "Effect Search Paths" points to the reshade-shaders\Shaders folder you made.
Click "Reload" (or press F6).

Step 5: Activate RTGI

Go to the "Home" tab. You should see qUINT_rtgi.fx in the list. Check the box next to it.
If the screen goes black or pink, you need to scroll down to the "Preprocessor Definitions" and set TEXTURE2D = 1 for DX11 games or TEX2D = 0 for older DX9 games.

3. Why v0.33 is not officially downloadable

Marty McFly’s RTGI became part of ReShade’s internal effect repository only for newer versions (5.x+).
Older versions like 0.33 were distributed temporarily during beta/patron cycles.
The developer encourages using the official ReShade Effect Repository or paid Patreon for latest builds.
Distributing v0.33 without permission may violate Patreon early access terms.

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