light_source{z*6rgb 3fade_distance 10fade_power 2spotlight point_at 0radius 10falloff 20}plane{z,2pigment{crackle color_map{[0rgbf x+y/2+t][.3rgbf x+t][.3rgb y+z][.7rgbf 1][1rgbf 0]}scale.2}hollow}media{intervals 20scattering{1,rgb.6}samples 1,4}