Penrose triangle
Oscar Reutersvärd; independently Lionel & Roger Penrose
Three convincing corners. One impossible connection.
Impossible objects / 2005 drawing
Impossible waterfall
A channel seems to return water to its own starting height.
TRY THIS
View larger, then trace one connected edge all the way through the object. Compare the local joins with the whole shape.
THE IMAGE IN THIS ARCHIVE
Pbroks13
Original file & attribution · Public domain
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What is Impossible waterfall?
A channel seems to return water to its own starting height.
What should I look for in Impossible waterfall?
View larger, then trace one connected edge all the way through the object. Compare the local joins with the whole shape.
What explains Impossible waterfall?
Follow the apparent downhill route and compare its endpoint with its start. The drawn architecture supplies locally believable cues for a globally inconsistent height relationship.
Another way to see it
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Impossible cube
M. C. Escher; modern redraw by 4C and Belbury
A familiar cube frame acquires an impossible set of overlaps.
