Just a quick introduction and a question or two. I am an old dog learning new tricks. Have been an artist, illustrator for over 40 years. Picked up Sketchup about three months ago and wow, really nice program. This is my first time doing 3D work. Out of this new skill set, I have three projects in the works.
Question:

1. How do you create an indentation or change the terrain elevation on an incline or hill such as a road, street, sidewalk?
2. What is the best renderer in Sketchup to create urban planning site as much as 5 to 10 city blocks?

Thanks,
JPRPAINTER