-Represents a single instance of an Object. An application can derive another
-class from this and overload the hook functions to specify location and other
-instance-specific parameters for the rendered objects.
+Represents a single instance of an Object. Thanks to being derived from
+Placeable in can be positioned without additional effort. Other instance
+parameters can be set by overriding the hook functions.
+
+ObjectInstances can benefit from being put in an InstanceScene, which will
+render all instances of the same object consecutively.