The following examples are in the ??? category:

• Cortona Specific Features - Examples using Cortona-specific nodes: Position2Interpolator, Keyboard sensor, AdvancedAppearance, and Font3D.
• Happy New Year (2001) - An firey start to the new millenium, this example demonstrates techniques in scripting, prototypes, animation, optimization, and browser integration.
• Heads Up Display - Creation and use of a heads-up display.
• Inline and Prototypes - Investigates the similarities and differences between the Inline and EXTERNPROTO nodes.
• Maze - Navigate through the maze.
• Where Am I? - Determine position and orientation in world.