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Hands free mouse look is a dynamic view, but fixed perspective. The 3D trick is a fixed view with a dynamic perspective. You are correct.

<t>[quote=acewing]yet this 3d illusion (not stereoscopic btw) only works if the view is fixed[/quote]<br/> <br/> A fixed view is irrelevant to this concept. <br/> <br/> - the current realm of graphics consist of a 3D scene projected onto a 2D surface.<br/> <br/> - the stereoscopic vision trick allow...

<t>what is known as 'head tracking' is really just directional, positional data, aka, vectors. Where your head is pointing, and where it is relative to the 'center' point.<br/> <br/> the stereoscopic vision illusion is positional data. It works because the application/game will render the scene base...