imsize 512 256
eye 0 0 0
viewdir 0 0 -1
updir 0 1 0
hfov 45
bkgcolor 0.1 0.1 0.1 1
light -2 1 0 1 0.5
mtlcolor 0 1 1 1 1 1 0.2 0.6 0.2 20 1 1


v -1 1 -4
v -1 -1 -4
v 1 -1 -4
v 1 1 -4

vn -1 1 1
vn -1 -1 1
vn 1 -1 1
vn 1 1 1

f 1//1 2//2 3//3
f 1//1 3//3 4//4