I just got done complaining about the crappy wall texture in this Witcher 3 scene. All games need work.
Is that the Witcher 2 or 3? And if 3 what trailer is that scene from? I didn't know Saskia was in the game.
On topic, the game is a year away, they'll get the work done to get it to look good. Like others have said, the reason publishers show CG trailers all the time is because of threads like this.