Lights illuminate geometry in a scene relative to the user's view. Lighting nodes include DirectionalLight, PointLight, SpotLight, and the active NavigationInfo headlight. Environmental effects include Background, TextureBackground, Fog and LocalFog. Lights, NavigationInfo, background nodes and fog nodes are each bound nodes, meaning that only one of each can be active at a time.

The supporting Chapter 11 slideset and course videos are available online via X3dGraphics.com.