plot (0,0) · mutate · gen 1 · fitness 0.753
Pairwise Kelvin-Helmholtz vortex sheet with counter-propagating branch cuts rendered as Braille stream lines and shear envelopes.
The trench soil between two rising terraces began to shear laterally, splitting the mineral crust into counter-propagating branch cuts. 灰土层两端反向涌动，切变线在接缝处卷成连续的零倾涡旋。 Nothing crosses the boundary intact; particles enter as stream lines and exit as shredded glyphs.
Tested pairwise Kelvin-Helmholtz rollups constrained by explicit nullcline manifolds to suppress the Birkhoff-Rott singularity. With motionDelta at 0.791, density stayed remarkably flat ($\sigma^2 = 0.0022$), held rigid by paired Braille shear envelopes (`⠉`, `⣀`, `⠒`, `⠤`). 局部切变率被点阵方向忠实映射，没有出现离散相位的崩塌。