Professor, Dr. of Engineering (to my Japanese homepage)
The roof of a garage and its mirror image appear to be quite different. The human brain likes to interpret the edge of the roof as a planar cut perpendicular to the axis of the roof, but actually ...
Visit here for the "Ambiguous Objects" and construction kit for the garage roof.
Meiji Institute for Advanced Study of Mathematical Sciences
Organization for the Strategic Coordination of Research and Intellectual Property
4-21-1 Nakano, Nakano-ku, Tokyo 164-8525, Japan