(y 
.(vmax 
..(scale 
...(min-component 
....(vfrac 
.....(lightness-from-rgb pos))) 
...(length 
....(z 
.....(turbulate 
......(average 
.......(hue-from-rgb 
........(v- [-2.7894 0.8857 1.6279] pos)) [-2.677 -2.6666 -1.8188 -1.9398] 
.......(vabs 
........(vmin -0.1247 [-2.0186 2.1142 -0.1916]))) 
......(adjust-hue 
.......(gradient 
........(checker grain [-1.8881 -1.6125 0.1858])) 
.......(blue-from-hsl 
........(radius pos))))))) -2.1079))