Questions about LiveDB, xGen Primitives and Geometry type

[sfab]

Hi to all,
I have some question and I hope that someone can help me.

1: I don't know why Live DB inside maya's render setting is always disabled even if I press refresh button.

2: there is a way to render xGen Primitives, or export them to render in standalone application?

3: I know that octane can render pfxHair inside maya, i would want to know if is possible to render also Nurbs curves.

4: If i want to smooth a mesh with control under Extra Attributes in shape node of the object, I must change Geometry type from "global" otherwise smooth level have no effect. Is normal? Anyone can explain me why?

Thank you!