Cannot Enable TressFX on Nvidia Card Despite the Feature Being Vendor Agnostic

Hello, I bought this game in the steam sale and can't enable TressFX. I have a gtx 690 (still a very powerful card, equivalent to 780ti performance or better) and tressFX works fine in tomb raider and I very much enjoyed it in that game.



I understand you disabled this for Nvidia cards, however I'm not sure why, as it's vendor agnostic and should work fine on Nvidia cards. I understand there is a significant performance hit, but I'd be very grateful if you could tell me if there's any way to enable it so that I can test it for myself?



Many thanks,

ltron