The "ground" won't show up in a render, you will need to use some kind of "floor" prop. You could use a square primitive with a texture or most building type props have a floor prop included, check the free stuff area and do a search for "mapps" he has some indoor scenes with floor props available!

Shadows will only show up if you have them selected in the render options!

Injustice will be avenged.
Cofiwch Dryweryn.