Very happy to introduce DeepSky Haze - a physically-based atmospheric scattering package designed to easily add stunning natural fog and true volumetric haze effects. It takes advantage of modern rendering techniques such as temporal reprojection to give high-quality results, fast.
physically-based atmospheric scattering (classic Rayleigh and Mie) true volumetric haze, using the directional light shadow map for light shafts height-based fog with sun lighting flexible zoning system to create effects for specific areas create custom time-of-day variants for changing atmospherics during day/night cycles* custom transparency shaders to integrate with the atmospherics
(*DeepSky Haze is not a time-of-day system, but allows you to create atmospheric effects that can be smoothly blended via a Time parameter.)
The system works on DX9, DX11 and OpenGL Core (for best quality and performance, DX11/OpenGL Core are recommended, mobile platforms are not supported).