(Material sphere1mat (color .4 .5 .9) (ka .1) (kd .5) (ks .5) (ksp 150) (ksm 1) (kt 0) (ktn 1) )
(Material sphere2mat (color .9 .4 .5) (ka .4) (kd .2) (ks .5) (ksp 20) (ksm 0) (kt 0) (ktn 1) )
(Material sphere3mat (color .5 .9 .4) (ka .5) (kd .5) (ks .3) (ksp 4) (ksm .5) (kt 0) (ktn 1) )
(Sphere sph1 (radius 2) (material sphere1mat)) (Sphere sph2 (radius 2.5) (material sphere2mat)) (Sphere sph3 (radius 1.0) (material sphere3mat))
(Light amb (type 3) (color .5 .2 .2) )
(Light dir (type 0) (color .4 .8 1.2) )
(Light pt (type 1) (color 1.39 .2 .2) )
(Camera cam (perspective 1) (l -1) (r 1) (b -1) (t 1) (n 3) # no far plane )
(G threespheres (I cam1 cam) (I dir1 dir (Xform 0 0 -.5 0 0 0 -.5 0 0 0 .5 0 0 0 0 0)) # points toward (.5,.5,-.5) (I amb1 amb) (I pt1 pt (T 0 0 -14)) (I s1 sph1 (T -2.5 -1.5 -17.0)) (I s2 sph2 (T 0 4.0 -25)) (I s3 sph3 (T 1.5 -1.5 -10.0)) )
(Render threespheres)