(y 
.(vdivide wood 
..(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])))))