The Maelstrom

The Burning Ship map z -> (|Re z| + i|Im z|)^2 + c iterated over the parameter plane, zoomed to half-width 9.3e-09 on the Misiurewicz point c = -1.7322588288433 + 0.0002167052834i. Its multiplier has modulus 2.1228 and argument 60.52 degrees, so the frame repeats once per 88-fold zoom and holds 8.2 self-similar rings. The arms are level sets of the smooth escape count, spread by histogram equalisation, and the distance estimate is reduced to glinting nodes strung along them.