I'm a bit late to this one I guess, but I finally decided to try to give the game a fair shot. So I fire up the game and IMMEDIATELY notice the dithering. The character's face in particular was screwed up beyond hope. Naturally I assume I've screwed up some setting somewhere and start looking at the settings. Nothing unusual. In fact, I tend to turn off a lot of annoying post processing effects like the vignette, blurring, and etc. (Why do people want their games to blur???) So I google around and find threads discussing it. Apparently it's how they implement shadowing. The fanboys say it's the best method yet (the reality says, I've played a lot of games over the years with powerful shadowing techniques and none has ever looked so bad ever. The excuse that it eliminates the old blurry shadowmaps isn't valid because it provides a newer uglier shadow method that puts ugly dithering on just about every single surface in the game.)

I guess in the meantime I'll see if I can do something with SweetFX. People say that turning off their antialiasing setting in the game (which apparently uses post-processing anyway -- why are devs so determined to eliminate real FSAA on even the PC ports of games?) helps considerably. Since they're using a shader anyway, presumably SweetFX's SMAA is probably better, so it's worth a try. But disabling the built in antialiasing only helps, it doesn't eliminate. It's just really hard to believe that there isn't any way to eliminate this problem via some mod or something.

What's dithering?

Awesome, I didnt even know that had a name. It only happens on a few cutscenes, especially the first one. You could look for a fix here though I never really gave a damn over it.

Google NEXUS WITCHER 2. Apparently I am not worthy of posting links.

Lol I just spend 2 hours trying to change all my settings to get rid of the grid shadows everywhere in my cutscenes only to find out its a feature.

Well I'll just keep playing and see if I can get over it. Witcher 1 was a blast anyway.