Follow these sets to set up AOVs in RenderMan for Katana:

color lpe:C<RD>[DS]+[<L.>O]



To correctly render LPE in Katana, you need to use an OpScript to declare how these are routed to the outputs. Below is an example for Specular, RoughSpecular and Clearcoat Lobes.

Interface.SetAttr('prmanGlobalStatements.options.lpe.specular2', StringAttribute("Specular"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.specular3', StringAttribute("RoughSpecular"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.specular4', StringAttribute("Clearcoat"))


EXR Metadata

You can add metadata to the EXR file to facilitate pipeline functions. The Foundry documents this here.

Essentially, on the Render Settings node:

SetAttr("renderSettings.ouputs.primary.rendererSettings.exrheaders.test_string",[ "Your string" ] )