English: The production rule is (a ↦ b) (b ↦ bc) (c ↦ bca) with initiator a, iterated for 20 generations. The incidence matrix M [0,0,1; 1,1,1; 0,1,1] has characteristic polynomial f(x) = x3 − 2x2 − 1 and dominant eigenvalue ς = 2.20557 (the supersilver ratio).
The central tile and its three subtiles have areas in the ratios ς2 + 1 : ς(ς − 1) : ς : 1. The viewport width is 2.6 and the origin is at the eye of the jaggy swirl.
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