How to get different looking worlds

[UnitedSouthAsiaIsTheDream 0]

So I was watching a Drew Durnil video in which he created two worlds- east vs west- and I wanted to see how he made that look how it is. There is no form of terrain, and land is entirely blue or red. I don't know how to make this. Can anyone help me?+

[soulplexis 36]

go into game options province settings and set the alpha all the way up