illusions

Escher’s Waterfall Video Illusion – An Explanation?

Escher’s Waterfall Video Illusion – An Explanation?

Two weeks ago we covered YouTuber mcwolles‘ remarkable full-motion illusion appearing to show M.C. Escher’s impossible Waterfall in real-time operation. Those of you hungry for an explanation may be interested in this diagram from Boing Boing reader David Goldman, who thinks the video was shot using forced perspective, with a model as illustrated, in two cuts spliced together at the 0:45 mark.

Papercraft optical illusion

Koukichi Sugihara of the Meiji Institute for Advanced Study of Mathematical Sciences in Japan built this clever papercraft illusion. In this video, wooden balls roll up the slopes just as if they are pulled by a magnet. The behavior of the balls seems impossible, because it is against the gravity. The video is not a […]

Origami model + reflection = skull

Origami model + reflection = skull

This amazing origami model, which appears to be a skull when resting on a mirror, was designed in the late 90s by renowned paper-folding artist Herman Van Goubergen, who seems to have no web presence of his own. The upper model was made and photographed by Flickr user M_V_origami. Instructions for folding the model are included in OrigamiUSA’s 1999 annual collection, which is available for sale here.