Hi,
I’m am trying out blender to see if it could be the tool for me going forward. While browsing through a few tutorials I came across this one and I have to say it looks stunning. I wanted to try to follow the steps in your video and using the shaders that you provided in the description. Everything workes fine except that my atmosphere is completely transparent. There is no colour or anything other that is visible. I am using Blender 2.82 and I have made sure that I connected the AtmoShader_V3 to the volume pin of the Material output.