Drawing of "blivet" or "poiuyt" impossible object. If the bottom section is covered up, then there are two bars with rectangular cross-section descending; while if the top section is covered up, there are three cylindrical rods ascending. Both top and bottom are shown against quasi-backgrounds (horizontal lines) to enhance the illusion. If both the bottom and the top are covered, then there are only six evenly-spaced parallel lines...
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Drawing of "blivet" or "poiuyt" impossible object. If the bottom section is covered up, then there are two bars with rectangular cross-section descending; while if the top section is covered up, there are three cylindrical rods ascending. Both top and bo