The "Cactus Garden Screen" is a relatively thin plane (less than 5" thick) where the depth perception is accentuated by different plants on different planes and painted different colors.  The spaces between the plant elements are voids that allow you to see through the plants to the other side.  The image is different on both sides as you view the work from each direction.  It is a perfect solution to subdivide a covered patio into two separate areas.