Liu 2009 — ẋ=−a x − y², ẏ=b y − k x z, ż=−c z + m x y. Classic a=1, b=2.5, k=4, c=5, m=4. Distinct from liu.html (2004) and liu-x2.html. RK4. Gold trail, cap 650. RM = settled silhouette, no animate-on.