I find the assertion that pitch black nights are realistic quite hilarious. Anyone suggesting this should seriously visit a physician because there is most definitely something wrong with your vision. Either that, or you've never gone outside at night. The following is taken from the American Optometric Association's website in regards to the human eye and how it works at varying levels of light. link: http://www.aoa.org/x5352.xml DAY VERSUS NIGHT VISION According to a widely held theory of vision, the rods are responsible for vision under very dim levels of illumination (scotopic vision) and the cones function at higher illumination levels (photopic vision). Photopic vision provides the capability for seeing color and resolving fine detail (20/20 of better), but it functions only in good illumination. Scotopic vision is of poorer quality; it is limited by reduced resolution ( 20/200 or less) and provides the ability to discriminate only between shades of black and white. This limitation can be easily confirmed by noting that, at dusk, the different colors of a flower garden become virtually indistinguishable. However, the scotopic system provides enhanced sensitivity and low detection thresholds under markedly reduced illumination. This dual-receptor system allows the human eye to maintain sensitivity over an impressively large range of ambient light levels. Between the limits of maximal photopic vision and minimal scotopic vision, the eye can function rather effectively to changes in brightness of as much as 1,000,000,000 times. The sensitivity of the eye automatically adjusts to changes in illumination. The dimmest light in which the rods can function is equivalent to ambient conditions of an overcast night with no moonlight. The dimmest light in which the cones can function is roughly equivalent to a night with 50% moonlight. Thus a white which can just barely be seen by the rods must be increased in brightness 1,000 times before it becomes visible to the cones. The light intensity of the sun is approximately 30,000 times that of the moon, yet the eye can function well in bright sunlight as well as in dim moonlight. Although the human eye can function over a vast range of brightness, the retina is sensitive to damage by light, e.g., from lasers or unprotected sun gazing. This potential for light injury exists because the optics of the eye can concentrate light energy on the retina by a factor of 100,000 times. So, from this we can see that our eyes have two ways of providing vision. The first is our normal vision in optimal resolution and color quality, which uses the cones. The second is a lower resolution and color quality that we get from the rods. The cones can function on a clear night with at least 50% moonlight, and the rods function in overcast with no moonlight. This means that even in a pitch black setting, the human eye functions at a base level. This is why at night, even if there is no moonlight and full cloud cover you can still see. Your vision is nowhere near as good as in regular moonlight or during the day, but you still have vision. As mentioned in the quoted article, our "Night Vision" is comparable to 20/200 (Things 20 feet away have the clarity of something 200 feet away with a normal eye) with colorblindness. While this is not optimal vision, it is far better than no vision. Currently, DayZ offers no vision, and hides behind the delusion that that is realistic. This seems to be a common theme in Arma II (rotational blur and vision bobbing while running, which human's with normal vision and brain function don't perceive because our brains actually process our vision properly so that we don't notice it) so I can't fault the creator too much.