Terraforming Videos?

[realedazed]

Hello! Has anyone done and tutorials on terraforming? I'm starting my camp and i thought it was reasonably flat. I placed one side of gates with no problem, but nothing else I place is "valid". I'm just assuming because it's not level. I'm having a hard time figuring it out. I get the basics of what the buttons do, I guess though. I'm just not sure how to use them.

I attached a pic. In retrospect, I should have waited until daytime to take the picture. But that's what I'm working with. You may need to see it in person, though.