To be able to appreciate the three-dimensional effect, it is necessary
to observe the images with glasses of red (for the left eye) and blue
colors (for the right eye). If you don't have such kind of glasses, but
you do have two photography filters, the blue and red different ones,
you can use them in front of every corresponding eye and you will obtain
the same effect of depth. The anaglyphs were digitally obtained with the
Photoshop, from a few old stereoscopic photos on glass, which Marcelo
Berlingieri, the father of Nicolás, took a lot of time ago.