and custom Reshade presets. But the RTGI was the final piece—the "magic" that would turn pixels into light. He launched
Adjusts how the effect behaves at different distances from the camera. 4. Compatibility Notes Presettings: Many users create specialized
RTGI 0.17.0.2 is a version of the that enables screen-space ray tracing for global illumination. It works by analyzing the depth data of a game scene to trace rays and simulate how light interacts with surfaces, creating realistic, dynamic indirect lighting, color bleeding, and soft shadows. Key aspects of this specific 0.17.x era include:
If you set the value too high, you will notice . Too low, and shadows will appear weak or missing entirely.
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Unlike NVIDIA RTX-native ray tracing, RTGI works on almost any GPU that supports decent computing (NVIDIA GTX, AMD Radeon), as it operates on the shader pipeline, not dedicated RT cores.
is more than a version number; it is a testament to the power of open-source rendering research. For gamers stuck with older hardware or frustrated by the slow adoption of ray tracing in legacy games, this update delivers tangible visual improvements—smoother motion, fewer artifacts, and better performance scaling.
RTGI works by utilizing the of the game. It doesn't know what the 3D model looks like, but it knows how far away every pixel is from the camera.
Look for a section where rays are traced with a fixed step size.
Integration and engineering considerations
RTGI cannot see the sides or backs of objects that are not visible to the camera—it must estimate how far objects extend beyond their visible surfaces. The parameter controls this estimation. The default value is 0.250 , which works well for many games. However, optimal values vary significantly: games with thin objects (like foliage) typically need lower values, while games with solid, thick geometry may benefit from higher numbers.
