Hi, i have a problem with the game, i just downloaded and when i start playing and move the camera with the mouse this one (Jittery mouse movement), i followed all the steps, but he didn't work, what can i do for fix it, help please

Have you tried playing the game with an Xbox controller
Camera is much more smooth with a controller, PERSONALLY I think the game is better played with a controller anyway

Try turn off overlay in GOG Galaxy client. Work for me.

The most dangerous monster in this game appears to be one called "Camera" :/ It's a wonderful game, but one disappointing aspect is the degree of consolities going on. Wish they didn't do that, but it's not surprising given what happened with Witcher 2. I definitely miss the more pure PC focus from the first game, with menus that actually made sense.