Quadrilateral Lace
Susan Happersett

This paper will describe the exact procedures I use to draw algorithmically generated mapping patterns in the framework of quadrilaterals. I began with a square format, then rhomboid and trapezoidal. Layering concentric self-similar shapes creates the illusion of 3-dimensional space. Shifting the self-similar shapes out of the concentric order creates the sense of movement across the plane.
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