ReShade RTGI (Ray Traced Global Illumination) shader, specifically version , is a post-processing tool developed by Pascal Gilcher
Select the correct rendering API (DirectX 9, 10/11/12, or Vulkan). reshade ray tracing shader rtgi 033
| Game | Recommended RTGI Intensity | Notes | | :--- | :--- | :--- | | | 0.55 | Disable game's SSAO. Use with an ENB for god-tier graphics. | | Fallout 4 | 0.60 | Dramatically fixes the "flat" lighting. | | GTA V | 0.50 | Works perfectly, especially in interiors. | | The Witcher 3 (Classic) | 0.70 | Better than the next-gen update's RT (performance-wise). | | Mass Effect Legendary | 0.45 | Removes the "grey wash" from lighting. | | Dark Souls 3 / Elden Ring | 0.65 | Adds bounce light to dark dungeons. Disable in PvP. | Reshade Ray Tracing Shader: RTGI 0
| GPU Model | Without RTGI | With RTGI 0.33 | Performance Loss | |-----------|--------------|----------------|------------------| | GTX 1060 6GB | 60 FPS | 42 FPS | -30% | | GTX 1080 Ti | 100 FPS | 75 FPS | -25% | | RTX 2060 | 85 FPS | 70 FPS | -18% | | RTX 3060 | 90 FPS | 78 FPS | -13% | | | Fallout 4 | 0
RTGI solves this by calculating how light bounces around a scene in real-time. It simulates how light behaves in the real world: colors bleed onto nearby surfaces (color bleeding), shadows become softer and more realistic the further they get from the object (contact hardening shadows), and ambient light feels natural rather than flat.