Appearance nodes control the rendered appearance of the geometry nodes with which they are associated. These nodes may have many instances in a scene graph, but only one instance may be active at any instant of time. VRML allows colors to be defined only with the RGB color model. A graphics device on which VRML scenes can be represented. For example, the SphereSensor generates spherical rotation events.
Events signal changes to field values, external stimuli, interactions between nodes, etc.
The parameters that distinguish one node from another of the same type. Fields can contain various kind of data and one or many values. These nodes define the properties of specific geometry nodes. These nodes generate events based on user actions, such as a mouse click or navigating close to a particular object. A node of type Anchor, Billboard, Collision, Group, or Transform.