Unlike standard shaders that just darken corners (SSAO), RTGI simulates light bouncing. It allows light to "bleed" from bright surfaces to dark ones.
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.
No. And yes.
Native RTX (or DXR) gives you accurate, world-space lighting with multiple bounces and no edge artifacts. It’s objectively better. Reshade Ray Tracing shader RTGI 0.33
But RTGI 0.33 runs on any GPU from the last 8 years, doesn’t require a 5-minute shader compilation, and costs a fraction of the performance. More importantly, it works in literally any DirectX 9–12 or Vulkan game.
You can’t inject DLSS 3.5 Ray Reconstruction into Fallout New Vegas. But you can inject RTGI 0.33. That’s the beauty of it.
We have all been there. You boot up a classic game from 2015—or even 2010—and despite the high-resolution textures and modded character models, something feels flat. The lighting looks fake. The shadows are painted on. Unlike standard shaders that just darken corners (SSAO),
Enter Pascal "Marty McFly" Gilcher and his legendary ReShade RTGI (Ray Traced Global Illumination) shader. While the world was debating whether their $1,500 graphics cards could run Cyberpunk 2077 with Path Tracing, Marty was busy giving ten-year-old games a lighting facelift that feels like magic.
With the release of RTGI 0.33, the bar has been raised again. Here is why this update matters for your game library.