Since the 1880s, with the appearance of black and white photography, the techniques and manipulations of this new global entertainment also emerged, not only for saving but also for capturing memories and emotions.
Charles Dickens, a scholar of stereoscopy.
Repeating patterns have already existed in nature. A beehive, a brick wall, or a mosaic offer a repeating pattern where a "stereogram" can emerge by chance.
But there is still something missing: the angle to achieve the effect, since from the right eye we observe a different angle than from the left eye, generating the three-dimensional perception. This is achieved with two photographs of an object but at different angles.
This stereoscopy technique advanced until the 1960s and 1970s, when, with the use of Technicolor and brightness techniques, 3D or anaglyph images emerged. These images were highlighted with blue and red colors, but with a small inconvenience for the observer: the use of special lenses and different colors for each eye, with illustrations, magazines, posters, and even complete 3D movies.
Research on these stereographic images has shown benefits for visual health and cognitive development, and helps with the development of the pineal gland, but I'll tell you about that from my perspective as a digital creator another time.
