Hello, so lately I've been working on a planet in Ue4 and I'm quite 
stuck adding effects to my planet. First off, how to do I go about 
adding an atmospheric glow depending on where the directional light 
hits. I have a glow around the planet but it's all around the planet. 
Secondly how do I mask the emissive glow parts on the planet to show at 
the dark side of the planet and not the light side. Thanks in advance!