In addition to the six symptoms of distortion shown in Analysis, further symptoms appear particularly on animations, either videos or interactive ones such as gaming. Worse still real sickness, called Virtually Induced Motions Sickness, can be caused or worsened by perspective distortions.
Exaggerated Amplification of Movements
Is a very misleading aberration and constitutes the bulk of distortions during animations. Hence it is a major contributor for the arise of the Visual Whiplash . Though all symptoms mentioned on this page are to blame, the exaggerated amplification of movements stems mostly from rapidly changing rotation movements of the camera in the y-direction, indicated as Pitch on the image above. It is a kind of making the Keystone effect animated, as illustrated by the pictures below showing renderings of a stage interior. Only the up- or downward direction of the view axis is changing between the scenes.
The foreshortening is very misleading because the camera is in bird eye’s view position, but the convergence of vertical lines occurred like a frog eye’s view.
One point perspective. In the reality, the human eye would have seen all four scenes like this, or approximately, invariably from the up- or downward angle of the view direction.
The foreshortening of the vertical lines occurred in the right direction, opposite to the first rendering.
The foreshortening occurred also in the right direction, but looks strongly exaggerated.
Rocking Scene Effect
Occurs when the camera shake mode, also called headbobbing is on. The rocking scene effect stems from rapidly changing rotation movements of the camera in the z-direction, indicated as Roll on the topmost image. This corresponds to like making the turning over effect animated.
Virtually Induced Motion Sickness
Is a consequence of the disconnect between what the eyes see on the screen and what the inner ear feels. A significant portion of the population, it’s estimated between 10-50%, experiences moderate to severe discomfort named “VR motion sickness” while gaming, according to an article on the guardian’s website exploring the subject.
This very unpleasant side effects of 3d computer generated imagery represents a risk of ruin for the gaming industry and it is also one potential barrier in the way of Virtual reality (VR) head-horn displays (HWDs) to becoming mass-market products.
The symptoms, similar of those of traditional motion sickness triggered by actual movement, include headaches, stomach awareness, dizziness, nausea, vomiting, pallor, sweating, fatigue, drowsiness, excessive production of saliva and disorientation.
It’s speculated that cyber motion sickness is caused by a disconnect between your eyes perceiving that the body is moving rapidly on the screen, while the vestibular system, the inner ear, perceives that the body is stationary. The brain gets confused and reacts through the above listed symptoms, assuming that the body has been attacked by a poison.
