(y 
.(vfrac 
..(polar 
...(scale 0.8633384461405266 
....(vsin 
.....(v+ 
......(vmax 
.......(scale 6.426276462157827 
........(rgb-from-hsl 
.........(gradient 
..........(z 
...........(gradient 
............(alpha 
.............(saturation-from-rgb -1.8355))))))) 
.......(z 
........(gradient 
.........(offset 
..........(alpha 
...........(saturation-from-rgb -1.8355)) 
..........(height 
...........(vabs 
............(green-from-hsl velvet))))))) [0.4061 -0.1928 -1.0101 0.2881]))))))