Zylanns Terrain Editor for Godot 3.1
Just wanted to throw this out there for anyone new(er) to Godot who might not know it exists. I'm not associated with the project in any way, but I really think it's fantastic and needs some mentioning and love Zylanns Terrain editor is really a great edition to the Godot community. I certainly hopes he keeps working on it. Anyone needing terrain in their games should certainly try it out.
I'm using it in my POC fantasy level I'm working on currently.
Thanks @Zylann !