#example of two sided surface
#should be viewed with backface culling

CQUAD


-1 -1 0		1 0 0 1
1 -1 0		1 0 0 1
1 1 0		1 0 0 1
-1 1 0		1 0 0 1

#same points, with orientation reversed (clockwise instead of counterclockwise)
-1 -1 0		0 1 0 1
-1 1 0		0 1 0 1
1 1 0		0 1 0 1
1 -1 0		0 1 0 1