Competitive Lotka–Volterra 3D — dx/dt=x(1−x−α y−β z), dy/dt=y(1−β x−y−α z), dz/dt=z(1−α x−β y−z). Classic α=0.5 β=1.5. Distinct from may-leonard / hastings-powell. RK4. Gold trail, cap 650. RM = settled silhouette, no animate-on.