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If you would like RenderMan for Maya or Katana to recognize your pattern plugin and provide a user interface for changing input parameters and connecting output parameters to other nodes, then you will need to create an args file for your pattern. The args file defines the input and output parameters in XML so that tools like RMS or Katana can easily read them, discover their type, default values, and other information used while creating the user interface for the pattern node. The args file format is described in the Katana Technical Guide and there are also example args files for the RPS pattern plugins in the/lib/RIS/pattern/Args/ directory of your RenderMan Pro Server installationPlease consult the Args File Reference for more information.