In traditional game rendering (rasterization), light typically travels in a straight line from the source to the object. If a red carpet is hit by sunlight, the nearby white wall stays white. In the real world, however, light bounces. That red carpet would reflect a subtle red glow onto the white wall—a phenomenon known as "color bleeding" or global illumination.
Search for RTGI in the shader list and check the box to enable it. 3. Key Settings in 0.17.0.2 rtgi 0.17.0.2
RTGI 0.17.0.2 is – expect 20–40% FPS drop at 1080p with bounce count=2. That red carpet would reflect a subtle red
RTGI и Complete RT Shaders получают серьезные ... - VK Key Settings in 0
While RTGI 0.17.0.2 brings "ray tracing" to games that never supported it (like Skyrim , GTA V , or Minecraft Java ), it comes with a noticeable performance cost. Ray Tracing: Is The Performance Hit Worth It?