I went down a rabbit hole based on your effect @qwejinxiaozhe lol. I still struggled a bit to understand the hemisphere shapes you were producing. Are you using the vertex color node on a painted hemisphere you created?
I am using amplify shader editor in Unity. Also, thank you @Luos_83 for your advice as well as your awesome tutorials, I followed some of your videos to achieve what I was able to start playing with below. The guys at Amplify helped me translate some of nodes from UE4 to amplify as well
Lastly thank you @AndreB for the advice, I started looking filterforge as well dipping my toes into Substance Designer. I gotta say after playing with shader for a while I am really digging sDesigner!