Figure 1.

Section of an expanded digital version of the graphic artwork ‘Tiles with quasi-ellipses’ (1992, acrylic on ceramic) by Eva Knoll. Histogram of the whole crystal pattern as inset. The vertical thin line and descriptive annotations in the histogram are due to the computer program CRISP. Note for references below the ‘bright bow tie’ feature with a pixel intensity of around 255, and the ‘dark curved diamond’ feature with an intensity level of around 21. The histogram entries are explained in the expanded online version of this paper (Moeck, 2021a ▸).