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The Triad Optical Illusions Coloring Book by Harry Turner
 

The Triad Optical Illusions Coloring Book by Harry Turner

In the 1970s, Harry Turner's experiments with optical illusions – designs which can be drawn on a flat piece of paper and which look like pictures of three-dimensional objects – led to the creation of the "Triad", a shape which appears to be constructed from three solid blocks but which cannot be assembled in 'real life'.
   Working with pads of isometric graph paper, Harry Turner found that he could create a wide range of Triads with straight, curved and complex edges, and that they could be assembled into overall patterns like those found in Islamic art or used to create objects to which the laws of perspective may be applied to heighten the sense of their reality.
   The original version of this book consisted of 32 pages of explanation of how to create the elements of Triads and how to assemble Triads into overall patterns, and 32 plates for colouring. This version contains just the first page of the explanation and 27 plates. Plates 8, 30 and 32 of the original collection have been omitted.

Description : Colour-printed card cover, black-and-white interior, 32 pages,
27 plates to colour, 8.2" x 10.9" (208 x 277 mm), paperback/stapled binding,
published by Dover Publications, Inc. of New York, 2006, @ $3.95 ($5.95 Canada)
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