Rabinovich–Fabrikant — dx/dt = y·(z − 1 + x²) + γ·x, dy/dt = x·(3z + 1 − x²) + γ·y, dz/dt = −2z·(α + x·y). Classic chaotic (α=0.14, γ=0.10). RK4, not Nosé–Hoover (y, −x−αzy), not Rucklidge (−κ·x+λ·y−y·z), not Wang–Sun (a·x+c·y·z), not Lü, not Chen, not Lorenz butterfly. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.