light_source{y+z*4rgb 2fade_distance.9fade_power 2}#declare g=function{internal(76)}isosurface{function{g(x,y,z)+y+.8-z/3}contained_by{box{-9*x-2*y-z,9*x+8*y+z*18}}max_gradient 2pigment{rgb x+y+z/2}normal{dents.8scale.1}finish{irid{.3thickness.1}phong.4}}