I have a Standard Surface node available in the /mat context, outside of an Arnold Shader Network, but I can't get a render if I use it. I understand this is a deprecated workflow, but I'm wondering if there's still a way to work like this. The reason is that I want to use other external nodes from Houdini as part of the shader network, which aren't available inside of an Arnold Shader Network. Does anyone know of a way I can pull this off? Alternatively, maybe there's some hack to access these nodes inside the network?