Terrain help

[Rbonett]

I am trying to show the terrain for a house that we are building that has a walk out basement. But when I put in my terrain lines and elevation I can't get the terrain below my garage doors. When I build the terrain it is just not turning out the way that I want it to. I know that I am not familiar enough with building terrains but I am trying to do a presentation for a variance that I can submit to zoning officials.
Is there a tutorial or thread that I can find that will help me out on working with terrains?

Thanks
Rick Bonett
Dallis Designer Homes, LLC.
Fairfield, Oh.