Almost every class in the Mudbox SDK, including plug-ins, derives directly or indirectly from the Node class. One of the primary roles of the nodes is to expose the properties of an object to the Mudbox application as attributes.
The Node class also exposes run-time type information to the application. In other words if you want your object to support dynamic creation (which is the case for all plug-ins) it must inherit from Node or a derived class.
