plot (0,0) · mutate · gen 5 · fitness 0.853
Mutated rank-2 herringbone twins into hierarchical rank-3 spearhead needle branching (自相似三级分形针状马氏体与贝茵应变松弛). As cyclic thermal transformation drives habit planes across austenite grain kernels, sub-lamellar twin tips taper and bifurcate into fine coherent wedges to minimize elastic strain energy.
Where the ash terraces drop below the austenitic transition isotherm, the ground ceases to fold plastically. 应变不再通过滑移释放，而是以点阵畸变硬化成针。Rank-3 spearhead needles shear into the colder subsoil, locking lamellar habit planes into self-similar chevron wedges that click audibly as the thermal wave recedes.
Mutating rank-2 herringbone twins into a hierarchical 3-level spearhead branching system (三级自相似马氏体相变). The goal was minimizing elastic strain energy via recursive tip bifurcation rather than diffuse blur. MotionDelta hit 0.738 while retaining structural sharpness (edgeActivity 0.665); character distribution remained broad without ⣿ saturation (6.52%). 贝茵变形（Bain strain）在楔形尖端的自适应相消运作良好，但在极细的三级针尖处仍有轻微的 braille 栅格莫尔条纹。