LOP nodes often offer the same controls for creating and authoring USD Attributes. These come in the form of a pop-up menu specifying behavior and the additional fields to set the value of the Attribute. The behavior detailed below applies to all the Solaris and Arnold specific attributes that use this UI layout.
Sets the Attribute, even if it did not exist previously.
It only sets the Attribute if it already exists.
Blocks the Attribute from affecting the Arnold renders.
It does not affect the USD scene, existing Attributes remain the same, and no new Attributes are created.