HowTo:Use the plane object

The Plane

In POV a plane is considered to have a volume, any point that is "under" the plane is inside, and any point that is "above" the plane is outside. This becomes important when you use a plane in CSG. A plane is defined in POV by a direction vector, and a float distance. The direction vector indicates the "up" direction, and the distance is how far in that direction from the origin the surface begins.

#include "colors.inc"
plane {y,-1
   pigment {checker White Tan}
}