God rays, also known as crepuscular rays or volumetric lighting, are a post-processing effect used in computer graphics and video games to simulate the phenomenon of light scattering and creating visible rays or beams of light in an atmospheric or foggy environment. This effect mimics the way sunlight interacts with particles in the air, such as dust or moisture, resulting in rays of light appearing to radiate from a central source.
How the original image and the effect are blended together, in most cases it does not make sense to deviate from the default value.
Whether the god rays should be blurred to reduce artifacts.
The density of the light rays.
An illumination decay factor.
A light ray weight factor.
A constant attenuation coefficient.
An upper bound for the saturation of the overall effect.
The size of the blur kernel.