As promised, a tutorial about my texturing methods in WorldMachine.
I UPLOADED AN UPDATED TUTORIAL HERE https://www.youtube.com/watch?v=NZAXdJruSeE
For creating the gradients I used ShareX https://getsharex.com/
But you can also use the standard Windows snipping tool.
Brushpack can be found here https://gumroad.com/l/terrainbrushes