Ray-Traced Global Illumination is a method that mimics how light behaves in the physical world. Unlike traditional "rasterized" lighting, which often uses static maps or simple approximations, RTGI calculates how light rays bounce off various surfaces to illuminate an entire scene .
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RTGI stands for . Unlike standard game lighting, which often looks "flat," RTGI calculates how light from a source interacts with objects and transfers color and light to nearby surfaces. Unlike standard game lighting, which often looks "flat,"
Unlike official "RTX" features, RTGI is software-based and works on almost any modern GPU, including AMD cards.
: Modern implementations often use techniques like ReSTIR GI (Spatiotemporal Reservoir Resampling). This algorithm effectively "reuses" light paths from previous frames or neighboring pixels, allowing for high-quality global illumination without requiring an impossible amount of processing power .
: It is highly recommended for single-player, atmospheric titles where immersion is more important than raw speed. Conversely, for competitive multiplayer games, players often disable it to prioritize smooth gameplay and higher refresh rates .