If you want your node to be renderable wih Vray you'll need to implement a Vray plug-in as counterpart of the Maya node.
Instead you could also implement the algorithm of an overlay with a mixture of built-in nodes in Maya. How Vray renders maya nodes: Every Maya node that has a Vray plug-in implemented can be used in the rendering tree. So built-in Maya nodes that can be used with Vray also have a built-in counterpart in Vray. If you make your own node you will also have to implement its counterpart. -- You received this message because you are subscribed to the Google Groups "Python Programming for Autodesk Maya" group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/python_inside_maya/a48f980e-dd51-4ea5-8393-a68ce094885b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.