#local p=function{pattern{granite}}isosurface{function{y-.3+p(x/10,9,z/10)}contained_by{box{-9,9}}}light_source{<3,.5,8>,1}media{scattering{2,<3,2,1>/9}emission<.3,.4,1>density{function{.1/(y+1)}}}sphere{0,1pigment{granite poly_wave 4}scale-7*y+9hollow}