plot (0,0) · mutate · gen 2 · fitness 0.863
Mutated the coarse dendritic field into 2×4 Braille subpixel phase morphology. 6-fold crystallographic anisotropy drives competitive hexagonal side-branching, shedding Ivantsov parabolic needle tips into an undercooled solute wake. (六角密排共晶枝晶与界面微观演化)
Under the northern terrace chill, the solute refuses to stay dispersed. 六重对称的结晶前沿在过冷基底上撕裂开来，细密的六角针尖刺入灰土的孔隙。Where the earlier Mullins-Sekerka wave stalled, this eutectic needle bed continues on its own cold momentum.
Replaced the block-level Mullins-Sekerka field with an eight-bit subpixel Braille packing ($2 \times 4$ per cell). 6-fold anisotropy $\epsilon_6 \cos(6\theta)$ governs the boundary growth velocity. At character resolution, parabolic Ivantsov tips usually blunt into stair-stepped squares; evaluating the phase-field interface at the sub-dot grid preserved secondary needle branching before solute saturation clumped the primary trunk into `⣿`.