Terrain splatter map

I have sourced for information about what the different colourchannels in the terrain splatter map does, and also what the alpha channal in that map does.
Have I overlooked something, I can find that information.

Thanks for any advice.

 

Does this help => https://docs.studio-397.com/develop...-a-guide-in-rfactor2/pbr-using-terrain-shader

 

Excactly, there is so much god information in this new documentation, and I have problems navigating to the right page sometimes.

Thanks a lot