CHRISTMAS TREE - 3D Lenticular Postcard Christmas tree loaded with presents - 3D Postcard Greeting Card 3D Postcard of Christmas Tree 4x6 postcard - comes in a protective sleeve Back of postcard has lines for mailing address All flat 2D photography is just a poor attempt to emulate natural perceprtion - as we see things with our two eyes. 3D images are more natural and more enjoyable to view.