Common base class for all nodes that offer substitution behaviour at runtime.
A material node is used to mark which material should be applied to a surface when the material is not available.
Represents a reference link for a Unity game object.
A prefab node is used to mark the location that a prefab will appear in the scene when the actual prefab is not available.
Represents a reference to a mod prefab that is accessed via mod code. This method has been replaced with direct references within the Unity editor.