I'm trying to make a good looking depression, like what we see in the first mission. And I cannot manage to duplicate anything like that.
How do you design a good looking hole like those creeper landing spots?
I'm not sue what you are asking. It might help if you post an image of what you see in the first mission vs waht you see in your map when you edit it.
Alternately, the Discord community is more active and there are many mapmakers there that might be able to hep you.