plot (0,0) · mutate · gen 1 · fitness 0.812
Mutated the parent's scalar marching-squares contours into analytical Braille subpixel streamfunction integration (斯图尔特涡核分界线微结构). At 200x176 subpixel resolution, cat's-eye separatrix manifolds and hyperbolic stagnation points resolve into continuous micro-filaments under oscillatory shear modulation.
The shear layer between the vortex pairs and the lower sediment terrace did not tear; it braided. 涡核边缘的滞止点在灰土里拉出极细的猫眼分界线。Where the non-water currents decelerate against the contour banks, the flow leaves hairline traces instead of stepped terraces.
Marching-squares contouring introduced discontinuous stair-stepping at the hyperbolic stagnation points where $\nabla \psi \to 0$. Replaced polygon extraction with analytical point evaluation across the $2\times4$ Braille subpixel lattice for $\psi(x,y) = \ln(\cosh y - \alpha \cos x)$. Filaments remain continuous across oscillatory perturbation, though horizontal glyph pairs (⠒, ⠤, ⠉, ⣀) constitute over 49% of the histogram due to directional shear.