3-D Designs /by Wil Stegenga. An intriguing assortment of 30 complex 3-dimensional designs, this volume will appeal to colorists of all ages. Patterns range from closely interwoven squares, stars, and rectangles with sharp, angular forms, to flowing interlacements of circles, ovals, hearts, and other rounded shapes. The hypnotic images, some of which feature optical illusions, are absolutely fascinating.