The Witcher 3 is clearly using it. I thought it was DirectCompute Based.
From what I understand AMD users can enable HairWorks in Call of Duty: Ghosts as well, though I have no idea if there’s a major hit to performance for AMD.(Don’t play COD games so wasn’t that interested)
When Tomb Raider first came out I had to disable TressFX because it killed performance when close up.
Having multiple options is always Win-Win. Perhaps it will help drive some optimization competition.
Appreciate the efforts .