This may be an incorrect way of duplicating but I have created an instance from a referenced object and these dont show up in the render when exporting to vrscene.
They render fine in the viewport.
VRay beta 3. maya 2014.
Procedure:
Referenced in hedge row object. (not proxy)
duplicated as instance to place around scene.
export and render vrscene.
Result:
Some hedges do render, about 10% of all the hedges in the scene.
Is this known issue?