Like the Cross, the Parallel stereo pictures can be viewed even without the Free-viewing techniques but adopting one of the numerous viewers in the market. We tested several and some of them really impressed us.
However, in comparison to the Loreo Cross viewer, a longer time for adaptation is needed which grows with the size of the images. For instance, the View Magic, after three-four minutes of testing, let us view some parallel pictures with size up to 70x50 cm.