Are you talking of bisection (Симетрала)?
Unfortunately (I even requested in vain long time ago) there's no such tool.
the closest one (and indispensable) is: http://www.smustard.com/script/Midpoint
Judging by the description this should work with Sketchup also, so this would be the easiest option for SU to Unreal workflow, at least to ones who use Vray for rendering in SU?