I notice that you use the vignetting in the first "test", but that's not how VRsickness works! SOME people get less nauseous with vignetting, but many others, like myself, get MORE sick when the vignette is there. It's because it's limiting your FOV, which can make the brain think there is something wrong with your body. It's not a "scale" going from one direction to the other, it's simply different humans and different ways of reacting to VR. No grades, just difference....