This is a two part tutorial that walks through an interesting little projects which helps to demonstrate some of the render dialog settings. It specifically discusses what is called radiosity or global illumination and some settings that control this function.
This set of brief tutorials walks through the creation, scene setup, and rendering of a magnifying glass object.
If you're new to 3D, and don't have a clue how to begin working in a 3D environment, this is the place to start. This set of tutorials are simple, 5 minute long videos designed to help those brand new to 3D quickly learn to navigate and begin working in Design3D SE.