Rabinovich–Fabrikant 1980 — dx/dt=y(z−1+x²)+a x, dy/dt=x(3z+1−x²)+a y, dz/dt=−2z(b+x y). Classic a=0.14 b=0.10. Distinct from rabinovich.html (same family, older chrome). RK4 strange attractor. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.