Complex sentence: A large number of built-in node types exist and can be used together to make complex indoor and outdoor scenes, new nodes are trivial to make and can be added at runtime, many extra ones are provided by the community.
Split into simpler sentences: A large number of built-in node types exist and can be used together to make complex indoor and outdoor scenes. New nodes are trivial to make and can be added at runtime; many additional node types are available from the community.