how to enable node and all children

[michaelrepucci]

I've created a number of on-the-fly objects (e.g., parent=viz.endlayer() and child=viz.endlayer() each with their own custom vertices), some of which I then link to each other with the command:

child.parent(parent)

I would then like to enable lighting for an object and all its children. I thought the command:

parent.enable(viz.LIGHTING)

would do this, but it didn't seem to work. So I tried:

parent.enable(viz.LIGHTING,'',viz.OP_TRAVERSE)
or
parent.enable(viz.LIGHTING,'',viz.OP_OVERRIDE)

but those also didn't work. I guess I misunderstand how to do this. Could someone please help?