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Non-DAG Nodes

Non-DAG nodes are simply just DG (dependency graph) nodes. This means that they are some sort of compute node that exists without a transform. Many non-DAG nodes in a new Maya scene are nodes that must exist for the scene to function properly. For the most part, default scene non-DAG nodes are not meant to be edited or modified by selecting and editing in the modeling windows. DG nodes are usually included as a part of a user-created dependency graph. Default non-DAG nodes are also almost always read-only and are not meant to be deleted. Again, Maya sometimes allows you to modify the attributes of its default non-DAG nodes, but the stability of your Maya scene will often be at risk. Some attributes of default scene DG nodes are exposed to the user through built-in UI elements, such as the default Hardware Render Globals. If Maya has not exposed the attributes of a default non-DAG node through a UI element, it is probably not necessary to attempt to modify these nodes by other means (unless you really know what you are changing).

Here are just a few examples of read-only, default non-DAG scene nodes that Maya absolutely needs to guarantee stability within your scene:


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