Yeah, painting large areas is part of it and I do know about the "paint-a-baseboard" function. Why I don't use that is the annoying patterns that get created with some of the textures that look so unnatural. I want to be able to hold down the [ key to keep the orientations spinning for a more naturalistic effect.
But more than that is the terrain-shaping. For example, I have part of the layout where the overall elevation is high. Let's say I want to create a simple large rounded hill. Using the smaller diameter, I can slowly massage up a hill, but it takes a while and can get "lumpy." If I had a large enough diameter tool, I could use a low sensitivity and let the increase elevation build up a nice smooth, clean hill. Now, I am aware of the pre-set mountains and slopes and hills, etc. And the hill does give me the effect I want. But the catch is the elevation. They always start at the zero mark as with a new, flat baseboard. It is not relative to the elevation I have. So the edges of the hill are at zero even though the landscape is at, say, 300.
Does that make sense? If not, I can take some screen caps later that will show what I mean.
Thanks!