Add physically based procedural skies and real 3D volumetric clouds you can fly through to your scenes in under a minute. SilverLining for Unity brings you the most popular features of the SilverLining C++ SDK, used extensively in commercial games and serious simulations, at a fraction of the price.
Specify any time, location, and cloud conditions, and SilverLining does the rest automatically. Framerates of 250 FPS on PC and 60 FPS on iPhone observed with volumetric cumulus cloud layers. Version 1.5 cleans up the editor view and fixes minor bugs. Tested with Unity 3.5 and Unity 4.