ReShade RTGI (Ray Traced Global Illumination) shader, developed by Pascal Gilcher (Marty McFly), is a post-processing effect that simulates ray-traced lighting and shadows in games. While ReShade itself is free and open-source, RTGI shader is not officially free

Because version 0.33 is legacy, you may encounter bugs. Here are fixes:

Here's the important information you need:

Did we help you install RTGI 0.33? Share your before/after screenshots in the comments below. For more ReShade guides, check out our Optimized Shader Database.

Launch your game and press the key to open the ReShade overlay. Go to the Add-ons tab at the top of the menu. Check the box for Generic Depth .

You don’t need an RTX 4090 to enjoy bounce lighting. You just need RTGI 0.33, a spare afternoon, and a game you love.

Video game graphics have advanced rapidly, but older titles and even some modern releases often lack the depth provided by realistic lighting.

manually, proving that the community’s desire for cutting-edge visuals often moves faster than the hardware manufacturers themselves. benefit the most from the RTGI effect?

Run the installer and select the target game’s executable ( .exe ) file.

Download the RTGI.fx (and any .fxh helper files) for version 0.33. Copy these files directly into the reshade-shaders/Shaders folder.