In addition to the raytraced shadow options from the previous lecture, rendering in Mental Ray gives you additional options, including the Mental Ray Area Light option for Maya spotlights. This section demonstrates the more precise sampling controls available for Mental Ray Area Lights. Mental Ray Shadow Shaders provide additional control over an object's shadows, and Mental Ray shaders feature Custom Linking from specific lights to the shaders. The lecture ends with an example of a time when raytraced shadows can be too slow to use.
Download Maya scenes from the author's website http://www.3dRender.com.