I replied to your other thread but I'm commenting here in hopes this gets taken seriously. At least when it comes to turning, I believe the issue is with the frame rate dropping. I've noticed a visually perceptible frame rate while turning the camera/character in the game (original PS4). You can tell because most of the time when turning, there are three crosshairs on the screen and the image is stuttering. The motion sickness could also be from bobbing distant geographic features and sky (the sky box) I've seen mentioned elsewhere on the forums..