The shader is finished. I explained my method of displaying a light-weight facsimile of atmospheric scattering in the previous devlog post. I posted the shader source code here. Try out the shader viewer in your browser here. To download the whole Unity 5.4 project – with the shader files and executables for viewing the shader on Android (TV), Windows, and Linux – download the whole package here.
Mobile-friendly atmospheric scattering shader
A light shader for atmospheric light scattering of light
Mobile-friendly atmospheric scattering shader 