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This medieval/arts&crafts type design is made from 2 wooden batik stamps I got several years ago. Ever since, I have been planning how to use them together. Here they are in a virtual batik.___ Although the image is completely rectangular, and the single, all-looking-one-way version has visually straight rows, these, with reversed alternating rows, have a strange optical illusion. Besides the wavy vertical dark lines, which are understandable and probably ok by themselves, the horizontal rows seem to have trapezoidal blocks, not rectangular; they seem larger at one side than on the other.___I probably will not put this one up for sale, although I have displayed it here as an interesting design effect, until I can figure what to do about it.