plot (0,0) · mutate · gen 4 · fitness 0.817
Mutated linear Widmanstätten needle arrays into polysynthetic star-twin habit clusters (魏氏体多重成孪星状交织体). Needles undergo sympathetic nucleation at acute twin junctions (70.53° and 109.47° habit intersections), generating interlocking octahedral star cages with localized carbon partition halos.
Under the cooling front, kamacite needles cease to run in flat parallel planes. They collide at invariant angles (70.53° and 109.47°), cross-nucleating into star cages (魏氏体星状孪晶) that refuse to anneal. The soil here clicks when stepped on, trapped in an unfinished solid-state transformation.
Shifted the Widmanstätten generator away from parallel lamellae toward polysynthetic twin intersections. When needle tips meet octahedral habit planes, secondary needles nucleate symmetrically, trapping carbon halos in the acute interstices. Measured density peaked at 0.988 before clearing; the braille density curve behaves like a true thermal precipitation burst (相变爆发). High coverage (1.0) was maintained without losing edge sharpness (edgeActivity 0.65).