Now we need to remove white, that is, make it transparent and keep only black tree. Here's how:
- select all (Ctrl-A)
- copy (Ctrl-C)
- go to quick mask mode (Q)
- paste (Ctrl-V)
- turn off quick mask (Q)
- clear (Del)
- Deselect all (Ctrl-D)
- Turn all to black (Ctrl-U, Lightness = -100%)
Copy the result and paste into the wallpaper. Use shape tool to draw white eyes. Now that looks good already!
Go back to ContextFree, create new tree, repeat the steps above to put it into the wallpaper. To make it look far away, scale the tree down, and then apply Gaussian Blur.
..and again, and again, and again.... :-)
Now, the moon. Select the background layer, create new layer above it, and use shape tool, or white brush, to draw a white circle. Then, use layer effects to add uter glow with settings similar to shown here.
Since there is the light source (moon), all trees should have reflection. They are easy to do. Select a tree layer, duplicate it, (menu layer - duplicate), flip vertically (edit - transform - flip vertical).
turn all to black (Ctrl-U, Lightness = -100%), and then use Distort tool (edit - transform - distort) to make the shadow fall correclty from the moon.