Global illumination (GI) simulates how light bounces between surfaces, producing soft shadows, color bleeding, and ambient occlusion. For decades, real-time applications relied on static or pre-baked solutions (e.g., lightmaps, probe volumes). The emergence of hardware-accelerated ray tracing (e.g., NVIDIA RTX, DirectX Raytracing) enabled dynamic RTGI, but at high computational cost.

The 01702 release is widely regarded as a stabilizing update. While earlier versions often struggled with flickering or heavy "noise" in dark areas, this build introduces more refined temporal accumulation. This means the lighting looks smoother during movement, reducing the "ghosting" effect that can plague screen-space ray tracing.