global_settings { assumed_gamma 1 } camera { location <-2.8356, 1.0000, -4.9115> look_at <0, 1, 0> angle 38.8508 } light_source { <-3.3125, 7.6250, -5.7374>, rgb 1 } box { -<7, 0, 7>, <7, 9, 7> hollow pigment { rgb 1 } } sphere_sweep { cubic_spline 4, <-3, 1.5, 0>, 0.4, <-1, 0.5, 0>, 0.4, <1, 1.5, 0>, 0.4, <3, 0.5, 0>, 0.4 pigment { red 1 transmit 0.5 } }