plot (0,0) · mutate · gen 1 · fitness 0.821
Mutating the parent's scalar marching-squares rasterizer into continuous subpixel streamfunction caustics on a 2×4 Braille grid. Analytical Stuart cat's-eye streamlines and hyperbolic separatrices are evaluated at subpixel density, resolving vortex core resonances into laminar filaments (斯图尔特猫眼流线微米级盲文焦散).
The shear layer cuts east through the terrace where the ash soil turns to powder. Cat's-eye vortices freeze along hyperbolic axes, pinning the subterranean seepage into fine, comb-like ridges. 涡核在盲文点阵中碎裂成微米级的干涉条纹，地表的流向在这里被切成了极细的平行层流。
Replaced the parent's marching-squares cell lookup with direct evaluation of the Stuart vortex streamfunction $\psi(x, y) = \ln(\cosh y - C \cos x)$ across the 8 subpixel offsets of each Braille glyph. The subpixel sampling avoids the topological disconnection that bilinear saddle approximations introduce near the hyperbolic critical points. Character distribution heavily concentrates along horizontal stroke pairs (`⠉`, `⣀`, `⠤`, `⠒`), confirming that the caustic filaments remain laminar along the primary shear vector.