Penrose triangle
Oscar Reutersvärd; independently Lionel & Roger Penrose
Three convincing corners. One impossible connection.
Impossible objects / 2006 drawing
Impossible isometric junctions
Believable isometric corners combine into an inconsistent structure.
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
Icey
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Download imageFrequently asked questions
What is Impossible isometric junctions?
Believable isometric corners combine into an inconsistent structure.
What should I look for in Impossible isometric junctions?
View larger, then trace one connected edge all the way through the object. Compare the local joins with the whole shape.
What explains Impossible isometric junctions?
Inspect the junctions one at a time, then follow a connected edge across the whole figure. Local depth cues disagree with the structure they collectively suggest.
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.
