| CAD Illusions |
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| | If shaded and edges highlighted, it appears to be a cube. (3 faces have distinct blue shade) | (all six faces have distinct blue shade) |
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| Believe it or not, it could well be this object shown below.  Wan't to see it for yourself ? Download this zipped AutoCAD 2000 file Illusion01.zip (10 kb) and observe the top view of this object in wireframe. |
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| Seven cubes or eight |  |
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| Can you see two different cubes ? |  |
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| Can you see two staircases ? |  |
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| This is an illusionary arrangement of cubes |  |
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| On this staircase, either you are climbing all the time or stepping down continuously. |  |
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| Washer Illusion |  |
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| Illusionary Crank |  |
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| Finite element analysis of an ilusionary object |  |
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| Ilusionary Joint |  |