imsize 1024 768
eye 0 0 15
viewdir 0 0 -1
hfov 60
updir 0 1 0
bkgcolor 0.5 0.5 0.5

depthcueing 0.5 0.5 0.5 1 0.4 60 0

light 10 10 -10 1 1 1 1

mtlcolor 0.5 1 0.5 1 1 1 0.2 1 0.1 5
sphere 4.5 4.5 -20 4.5
sphere -4.5 -4.5 -20 4.5

mtlcolor 1 0.5 0.5 1 1 1 0.2 0.8 0 5
sphere -10 0 -30 4
sphere -20 0 -30 4
sphere -30 0 -30 4
sphere -40 0 -30 4
sphere 0 0 -30 4
sphere 10 0 -30 4
sphere 20 0 -30 4
sphere 30 0 -30 4
sphere 40 0 -30 4

sphere -10 -10 -30 4
sphere -20 -10 -30 4
sphere -30 -10 -30 4
sphere -40 -10 -30 4
sphere 0 -10 -30 4
sphere 10 -10 -30 4
sphere 20 -10 -30 4
sphere 30 -10 -30 4
sphere 40 -10 -30 4

sphere -10 10 -30 4
sphere -20 10 -30 4
sphere -30 10 -30 4
sphere -40 10 -30 4
sphere 0 10 -30 4
sphere 10 10 -30 4
sphere 20 10 -30 4
sphere 30 10 -30 4
sphere 40 10 -30 4