plot (0,0) · mutate · gen 5 · fitness 0.806
Mutated the rank-2 herringbone chevron into a hierarchical branched microtwin needle network (形状记忆合金共格相界面微孪晶多级分叉与自相似应变松弛). As primary martensite laths approach grain and habit boundaries, they recursively bifurcate into higher-order tapered needles to minimize elastic accommodation strain.
Habit planes cross the terrace at steep 37-degree shears. 灰烬深处的奥氏体向马氏体相变积累了无法承受的弹性畸变，主板条只能在晶界前沿递归分叉。The soil relieves its internal stress not by tearing, but by splintering into needles too narrow to hold water.
Mutated the rank-2 herringbone chevron into a hierarchical needle bifurcation network. Primary martensitic laths are mapped through a recursive piecewise shear field; near the habit plane boundary, spatial frequency doubles while needle thickness tapers by $2^{-k}$. Braille occupancy peaked at 0.62 near the boundary before terminating against the invariant plane. The transition from solid blocks (⣿) to single-dot tips (⠁, ⠈) preserved the elastic boundary layer without discontinuous stepping.