Upcoming uSky 2.0 has been rewritten and using new Precomputed Atmospheric Scattering algorithm. This new and accurate method to render the atmosphere in real time from any viewpoint from ground level to atmosphere level.
It reproduces many effects of the scattering: such as the daylight and twilight sky color and aerial perspective for all view and light directions, or the Earth and mountain shadows (Occlusion) inside the atmosphere.