Meng–Yu² — ẋ=a(y−x), ẏ=−xz+35 x−0.3 y+0.15 x, ż=xy−3z+0.2 y. Classic a=10. 35x−0.3y+0.2y fold. Distinct from meng-yu.html / yu-li.html. RK4. Gold trail, cap 650. RM = settled silhouette, no animate-on.