Figure 5.

Natural perspective depiction of the 3D grid room. This is a drawing by one of the authors of the subjective visual experience of the experimental space based on a fixation point at the red ball. The drawing is a synthesis of both eye views, and the dotted elliptical line shows the approximate limits of the visual field, as judged from observation by the artist, which in this case is around 150 degrees on the horizontal axis and 90 degrees on the vertical axis.