This is my latest 24 x 24 Oak Tree window. It has two layers with the border, foreground and some of the tree foliage on the front layer. The back layer is the grass surrounding the base of the tree, the tree trunk and branches, and much of the foliage.
This photo shows a more detailed closeup of some of the rhinestones and beads used in the window.
This detail photo may allow you to see that there are two layers of leaves (beads) creating the foliage of the oak tree.