Just checked it, and unfortunately currently there is only an explanation, no solution.
NFS:NW [2012] does something relatively uncommon: On DX11 capable cards it utilizes DX11 without having a true DX11 renderer. No matter how new the card is, the game always creates a DX11 rendering device with feature level 10.0, something that vorpX currently does not support.
If there would be a way to force the game to use pure DX10 rendering through a command line switch or an ini tweak, this could be circumvented. Not sure though whether something like this exists.