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Selection–Stitch Model

Registered FCC growth. In-plane stitches build hexagonal sheets; rare lifts nucleate the next layer at ±√(2/3) L. Nodes colored by coordination K.
0.025 · QEC
QEC-selected value (p* ≈ 0.135). Drag to explore: →0 stays a single sheet; ≫2.5% roughens toward foam.
1
1100
nodes0
layers1
K=120%
mean K0.0
K = 12  (saturated bulk)
K = 10–11  (near-bulk)
K < 10  (surface / frontier)
drag = orbit · scroll = zoom