Can shadow people be not people?
Pareidolia In most instances, witnesses report seeing shadow people in the peripheral areas of their vision. This area of vision is linked to the areas of the brain that recognizes patterns, however it provides less detail to the brain than macular (center-forward) vision. This can lead to a condition known as pareidolia, in which the brain incorrectly interprets random patterns of light/shadow or texture as being familiar patterns such as faces and human forms. The same condition can also be observed in macular vision in low light conditions, or when viewing a complex but random image. A common example would be perceiving a shadow, thrown by an item of furniture in a darkened room, as being a person.