NEW IN R21
Input the Context structure here that should be used for all of the Node’s inputs. If this function is not used, the Context structure generated by the Material tag will be automatically used (details can be found under Context).
Local Context can be used to assign an alternative texture tile that can then be used only by the Node to which it is assigned. All of the Node’s other inputs will continue to use the global Context structure (details can be found under Context).