I don't know WHY exactly CDProjekt Red is sharing the bed with Nvdia, but using such proprietary nonsense like "HAIRWORKS" or "PHYSX" or using the Nvidia-Shader-Package weakens the PC-Plattform.

Don't get me wrong, I know that AMD has a hair and physic engine and their own package of shaders, but there is ONE huge difference:

AMDs stuff is a) open source and b) conform with Direct X.

CDProjekt RED could have use the TrissFX3-Engine. It's free, open source, so even when this features has weak results on Nvidia Cards, Nvidia could grab the code and enhance their drivers (which happened when Tomb Raider was released 2 years ago).

But Nvidias stuff is proprietary. Only Nvidia and the developer of the game has access to the code. AMD (or Intel) can't solve any problems here, because they have no access (and Nvidia won't give them access).

Why did CDProjekt Red choose a proprietary engine instead of the free one, which would work on every graphics card?

You know that "Hairworks" is a bottleneck on Kepler and works pretty well only on Maxwell. Yes Nvidia made bullshit with their drivers since few ones maybe to "force" customers to buy their last cards.
And, of course, you know AMD cards work finer than most of Nvidia ones with hairworks on (in TW3), so what's the point?)

Not t burst your bubble of delusions or anything but, AMD released the source code for TressFX after it it failed to gain any sort of traction. Remember how badly TressFX was performing on nVidia GPUs when Tomb Raider was released? I do. My 680 wept is it was brought down to its knees. Now AMD is on the other side of the fence and suddenly nVidia is evil. AMD needs to step up its game and seriously compete with nVidia for market share, stop whining about their direct competitor not giving them source code for their propitiatory tech. AS it stands now, nVidia has far more reach and better relationships with developers than AMD. And a bigger client base. So they can pretty much get away with whatever they want. A pseudo monopoly. So, unless the red team gets back to the game with some seriously compelling products, am afraid it will only keep getting worse. And remember, neither company is inherintly good or evil. They are both in it for money.

As for CDPR ..Who knows, though Id say its probably because of nVidias relentless marketing team.

HAHAHAHAHAHAHAHAHAAHAHAHAHAHA

Nice joke. Really.