Since I had enought of the rendertimes of volumetric atmospheres, I tried to create my own Evee compatible Earth Atmosphere.
I began by Rendering out a reference image of a volumetric atmosphere to get everything just right. Then I started setting up the shader.
The basis for the reylight scattering is a diffuse shader converted to rgb. The rest is just different fresnels with different values and different Colors.
I used 2 different spheres for the atmosphere to achive the white edge fading into the blue edge. After that, I blurred them both a bit in the compositor and added some glare.
I also have clouds, but they seem to only be shown if I have show backface enabled and I can´t do that because it leads to weird artifacts on the night side at the pole region.
Here is what I have so far:
There are some mistakes in it, mainly the stars being affected by the glare in the compositor and the stars showing on the earth.
That happened because I didn´t find how to use the object index in the compositor of Blender 2.8.
I don´t really know where to go with this, but I will probably turn this into an animation of some sort, maybe even with nightlights.
Please give any Feedback or tips.