rectilinear #3D rendering always takes a guess where your screen is, relative to your eye.
i say, "eye," because rectilinear rendering assumes you only have one.
so if you have one eye, and know where it is supposed to be (usually right in the middle, but distance to screen is a shot in the dark) and you keep it right there relative to your screen, rectilinear rendering won't create distortion.
problem is, you don't.
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and for smaller screens, or distant screens, the field of view they can present without (much) distortion gets really narrow: just the part of your own field of view that the screen occupies.
#3DGraphics
if a developer considers the (real world) environment well, they may be able to make a good guess that would produce a render that looks like a window into that virtual world. but they probably don't even think about it.
i am arguing that rectilinear rendering should not be the default it is for virtually all 3D graphics.
the mind can more easily correct for #curvilinear distortion.
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