Tesselated volumes

Is there possibility to work with tesselated shapes in ROOT?
As much as I know it is supported by Geant4 and LHCb uses that.
We have found some old posts about (possible?) future plans and I personally remember that years ago there was some initiative to create a unified geometry library with up-to-date high-performance implementation of geometry routines. What is the status now? What can we expect?
Regards,
Egor.