polynomial { 6, xyz(6,0,0):1, xyz(0,6,0):1, xyz(0,0,6):1, xyz(4,0,0):-3, xyz(0,4,0):-3 xyz(0,0,4):-3 sturm clipped_by { box{-2,+2} } bounded_by { clipped_by } pigment { color rgbf<1,0.7,0.2,0.5> } // normal { granite 0.1 } finish { phong 0.6 } interior { ior 1.5 } } /* box { -1.9, +1.9 pigment { color rgbf<0.3,0.5,0.9,0.8> } } */ light_source { <-33,66,-99> color 1 area_light <0,5,0>, <0,0,5>, 4, 4 jitter orient circular adaptive 1 } plane { y,-3 pigment { checker color rgb 0.2 color rgb 0.9 scale 1.5} } camera { location <5,10,-20> look_at <0,0,0> angle 20 }