Aizawa — dx/dt = (z − β)·x − δ·y, dy/dt = δ·x + (z − β)·y, dz/dt = γ + α·z − z³/3 − (x² + y²)·(1 + ε·z) + ζ·z·x³. RK4 3D continuous ODE, not Thomas cyclic sin, not Rössler fold, not Lorenz butterfly. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.