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To correctly render LPE in Katana, you need to use an OpScript to declare how these are routed to the outputs. Below is the full OpScript to use for the lobe names defined by PxrSurface and PxrMarschnerHair. If your studio has its own bxdfs with different names, you will need to add those names to these Options.
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SetAttr("renderSettings.ouputs.primary.rendererSettings.exrheaders.test_string",[ "Your string" ] ) |
Interface.SetAttr('prmanGlobalStatements.options.lpe.diffuse2', StringAttribute("Diffuse,HairDiffuse"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.diffuse3', StringAttribute("Subsurface"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.specular2', StringAttribute("Specular,HairSpecularR"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.specular3', StringAttribute("RoughSpecular,HairSpecularTRT"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.specular4', StringAttribute("Clearcoat"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.specular5', StringAttribute("Iridescence"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.specular6', StringAttribute("Fuzz,HairSpecularGLINTS"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.specular7', StringAttribute("SingleScatter,HairSpecularTT"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.specular8', StringAttribute("Glass"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.user2', StringAttribute("Albedo,DiffuseAlbedo,SubsurfaceAlbedo,HairAlbedo"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.user3', StringAttribute("Position"))
Interface.SetAttr('prmanGlobalStatements.options.lpe.user4', StringAttribute("UserColor"))